Built 2026-10-14 (14 October 2026)

Blue Hill Coop Weather Records (USC00190736)

Record envelope, standing records and threshold days for Blue Hill Coop (USC00190736), Massachusetts, United States, with 142 years of record.

Key Facts for Blue Hill Coop

  • Blue Hill Coop (USC00190736) is a weather station in Massachusetts, United States at 42.21 latitude and -71.11 longitude, 191 m (625 ft) above sea level.
  • The station reports from 1885 to 2026, 142 years of record.
  • 1,464 records set at Blue Hill Coop still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Blue Hill Coop set a daily record precipitation of 91.7 mm (3.6 in) on 28 September 2026 (provisional).

Provisional Records

Records set in the last 60 days are provisional until they clear the revision window.

About the Station

  • Location: Massachusetts, United States, 42.21 latitude, -71.11 longitude.
  • Elevation: 191 m (625 ft).
  • Period of record: 1885 to 2026, 142 years.
  • Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

3 days at or beyond a record
Daily record high and record low at Blue Hill Coop, with 2026 drawn through them The band shows the record high and record low for each calendar day at Blue Hill Coop. The lines show the 2026 daily maximum and minimum. 3 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -40-2002040 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Blue Hill Coop. The lines show the 2026 daily maximum and minimum. 3 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Blue Hill Coop, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan20.0 C (68.0 F)-26.7 C (-16.1 F)10.6 C (51.1 F)-18.3 C (-0.9 F)
Feb21.7 C (71.1 F)-29.4 C (-20.9 F)6.1 C (43.0 F)-18.9 C (-2.0 F)
Mar30.0 C (86.0 F)-20.6 C (-5.1 F)23.3 C (73.9 F)-13.3 C (8.1 F)
Apr34.4 C (93.9 F)-14.4 C (6.1 F)28.3 C (82.9 F)-3.9 C (25.0 F)
May35.6 C (96.1 F)-2.8 C (27.0 F)35.0 C (95.0 F)3.9 C (39.0 F)
Jun37.2 C (99.0 F)2.2 C (36.0 F)32.8 C (91.0 F)7.2 C (45.0 F)
Jul37.8 C (100.0 F)6.7 C (44.1 F)37.2 C (99.0 F)12.2 C (54.0 F)
Aug38.3 C (100.9 F)3.9 C (39.0 F)33.3 C (91.9 F)13.9 C (57.0 F)
Sep37.2 C (99.0 F)-2.2 C (28.0 F)28.9 C (84.0 F)7.8 C (46.0 F)
Oct31.1 C (88.0 F)-6.1 C (21.0 F)28.9 C (84.0 F)4.4 C (39.9 F)
Nov27.2 C (81.0 F)-15.0 C (5.0 F)n/an/a
Dec23.3 C (73.9 F)-28.3 C (-18.9 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Blue Hill Coop by the year they were set 1,464 records at Blue Hill Coop still stand. 1919 holds the most, with 30. 01020301885: 201886: 131887: 131888: 291889: 31890: 131891: 141892: 81893: 91894: 191895: 141896: 141897: 121898: 81899: 131900: 101901: 111902: 101903: 201904: 131905: 81906: 171907: 131908: 121909: 101910: 71911: 211912: 81913: 91914: 201915: 71916: 151917: 161918: 191919: 301920: 201921: 161922: 91923: 141924: 41925: 111926: 81927: 51928: 111929: 151930: 121931: 181932: 91933: 91934: 101935: 31936: 91937: 51938: 71939: 21940: 101941: 31942: 81943: 81944: 81945: 161946: 131947: 91948: 111949: 141950: 111951: 101952: 51953: 81954: 101955: 51956: 151957: 81958: 71959: 71960: 41961: 61962: 51963: 101964: 111965: 81966: 91967: 171968: 141969: 41970: 51971: 51972: 51973: 71974: 111975: 51976: 201977: 41978: 51979: 191980: 41981: 81982: 131983: 51984: 121985: 51986: 91987: 81988: 131989: 111990: 131991: 191992: 31993: 91994: 51995: 161996: 41997: 31998: 71999: 52000: 92001: 112002: 102003: 32004: 72005: 72006: 42007: 122008: 62009: 62010: 102011: 62012: 162013: 62014: 32015: 112016: 112017: 222018: 202019: 32020: 112021: 102022: 152023: 172024: 72025: 72026: 71885190019151930194519601975199020052020
1,464 records at Blue Hill Coop still stand. 1919 holds the most, with 30.
Standing records at Blue Hill Coop by the year they were set
Year setStanding records
188520
188613
188713
188829
18893
189013
189114
18928
18939
189419
189514
189614
189712
18988
189913
190010
190111
190210
190320
190413
19058
190617
190713
190812
190910
19107
191121
19128
19139
191420
19157
191615
191716
191819
191930
192020
192116
19229
192314
19244
192511
19268
19275
192811
192915
193012
193118
19329
19339
193410
19353
19369
19375
19387
19392
194010
19413
19428
19438
19448
194516
194613
19479
194811
194914
195011
195110
19525
19538
195410
19555
195615
19578
19587
19597
19604
19616
19625
196310
196411
19658
19669
196717
196814
19694
19705
19715
19725
19737
197411
19755
197620
19774
19785
197919
19804
19818
198213
19835
198412
19855
19869
19878
198813
198911
199013
199119
19923
19939
19945
199516
19964
19973
19987
19995
20009
200111
200210
20033
20047
20057
20064
200712
20086
20096
201010
20116
201216
20136
20143
201511
201611
201722
201820
20193
202011
202110
202215
202317
20247
20257
20267

All-Time Record Progression

17 new records
When Blue Hill Coop set new all-time records 17 all-time records were set at Blue Hill Coop between 31 July 1917 and 15 February 2015. Each dot is a new record. Record high minimum temperatureRecord low maximum temperatureRecord low minimum temperatureRecord daily snowfallRecord snow depthRecord high maximum temperatureRecord daily precipitation31 July 1917: Record high minimum temperature 25.6 C (78.1 F)30 December 1917: Record low maximum temperature -19.4 C (-2.9 F)30 December 1917: Record low minimum temperature -27.2 C (-17.0 F)22 July 1926: Record high minimum temperature 26.1 C (79.0 F)29 December 1933: Record low minimum temperature -28.3 C (-18.9 F)9 February 1934: Record low minimum temperature -29.4 C (-20.9 F)29 December 1945: Record daily snowfall 46.7 cm (18.4 in)25 January 1948: Record snow depth 106.7 cm (42.0 in)9 August 1949: Record high maximum temperature 37.8 C (100.0 F)10 August 1949: Record high maximum temperature 38.3 C (100.9 F)19 August 1955: Record daily precipitation 205.0 mm (8.1 in)16 February 1958: Record daily snowfall 47.2 cm (18.6 in)4 March 1960: Record daily snowfall 55.9 cm (22.0 in)25 February 1969: Record daily snowfall 69.6 cm (27.4 in)4 March 1969: Record snow depth 109.2 cm (43.0 in)26 December 1980: Record low maximum temperature -20.0 C (-4.0 F)15 February 2015: Record snow depth 114.3 cm (45.0 in)1920193519501965198019952010
17 all-time records were set at Blue Hill Coop between 31 July 1917 and 15 February 2015. Each dot is a new record.
When Blue Hill Coop set new all-time records
DateKindDetail
1917-07-31Record high minimum temperatureRecord high minimum temperature 25.6 C (78.1 F)
1917-12-30Record low maximum temperatureRecord low maximum temperature -19.4 C (-2.9 F)
1917-12-30Record low minimum temperatureRecord low minimum temperature -27.2 C (-17.0 F)
1926-07-22Record high minimum temperatureRecord high minimum temperature 26.1 C (79.0 F)
1933-12-29Record low minimum temperatureRecord low minimum temperature -28.3 C (-18.9 F)
1934-02-09Record low minimum temperatureRecord low minimum temperature -29.4 C (-20.9 F)
1945-12-29Record daily snowfallRecord daily snowfall 46.7 cm (18.4 in)
1948-01-25Record snow depthRecord snow depth 106.7 cm (42.0 in)
1949-08-09Record high maximum temperatureRecord high maximum temperature 37.8 C (100.0 F)
1949-08-10Record high maximum temperatureRecord high maximum temperature 38.3 C (100.9 F)
1955-08-19Record daily precipitationRecord daily precipitation 205.0 mm (8.1 in)
1958-02-16Record daily snowfallRecord daily snowfall 47.2 cm (18.6 in)
1960-03-04Record daily snowfallRecord daily snowfall 55.9 cm (22.0 in)
1969-02-25Record daily snowfallRecord daily snowfall 69.6 cm (27.4 in)
1969-03-04Record snow depthRecord snow depth 109.2 cm (43.0 in)
1980-12-26Record low maximum temperatureRecord low maximum temperature -20.0 C (-4.0 F)
2015-02-15Record snow depthRecord snow depth 114.3 cm (45.0 in)

Wettest Day of Each Month

Aug: 205.0 mm (8.1 in)
Record daily precipitation for each month at Blue Hill Coop The wettest day on record for each calendar month at Blue Hill Coop. The most was 205.0 mm (8.1 in) on 19 August 1955. 0100200300 Jan: 78.7 mm (3.1 in), 6 January 1889 Jan Feb: 123.2 mm (4.9 in), 12 February 1886 Feb Mar: 125.7 mm (4.9 in), 14 March 2010 Mar Apr: 91.7 mm (3.6 in), 1 April 1997 Apr May: 96.0 mm (3.8 in), 26 May 1967 May Jun: 154.9 mm (6.1 in), 14 June 1998 Jun Jul: 113.3 mm (4.5 in), 1 July 1915 Jul Aug: 205.0 mm (8.1 in), 19 August 1955 Aug Sep: 142.0 mm (5.6 in), 11 September 1999 Sep Oct: 156.0 mm (6.1 in), 21 October 1996 Oct Nov: 108.2 mm (4.3 in), 5 November 1955 Nov Dec: 133.4 mm (5.3 in), 27 December 1969 Dec
The wettest day on record for each calendar month at Blue Hill Coop. The most was 205.0 mm (8.1 in) on 19 August 1955.
Record daily precipitation for each month at Blue Hill Coop
MonthRecord daily precipitation (mm)Date
Jan78.7 mm (3.1 in)6 January 1889
Feb123.2 mm (4.9 in)12 February 1886
Mar125.7 mm (4.9 in)14 March 2010
Apr91.7 mm (3.6 in)1 April 1997
May96.0 mm (3.8 in)26 May 1967
Jun154.9 mm (6.1 in)14 June 1998
Jul113.3 mm (4.5 in)1 July 1915
Aug205.0 mm (8.1 in)19 August 1955
Sep142.0 mm (5.6 in)11 September 1999
Oct156.0 mm (6.1 in)21 October 1996
Nov108.2 mm (4.3 in)5 November 1955
Dec133.4 mm (5.3 in)27 December 1969

Period of Record Coverage

1885 to 2026
Days with data per year at Blue Hill Coop 142 years of record at Blue Hill Coop, 1885 to 2026. 1 years have data for under 90 percent of days and are left out of rankings: 2026. 1885: 334 of 365 days1886: 365 of 365 days1887: 365 of 365 days1888: 366 of 366 days1889: 365 of 365 days1890: 365 of 365 days1891: 365 of 365 days1892: 366 of 366 days1893: 364 of 365 days1894: 364 of 365 days1895: 365 of 365 days1896: 365 of 366 days1897: 365 of 365 days1898: 365 of 365 days1899: 364 of 365 days1900: 365 of 365 days1901: 365 of 365 days1902: 365 of 365 days1903: 365 of 365 days1904: 366 of 366 days1905: 365 of 365 days1906: 365 of 365 days1907: 365 of 365 days1908: 366 of 366 days1909: 365 of 365 days1910: 365 of 365 days1911: 365 of 365 days1912: 366 of 366 days1913: 365 of 365 days1914: 365 of 365 days1915: 365 of 365 days1916: 366 of 366 days1917: 365 of 365 days1918: 365 of 365 days1919: 365 of 365 days1920: 366 of 366 days1921: 365 of 365 days1922: 365 of 365 days1923: 365 of 365 days1924: 366 of 366 days1925: 365 of 365 days1926: 365 of 365 days1927: 365 of 365 days1928: 366 of 366 days1929: 365 of 365 days1930: 365 of 365 days1931: 365 of 365 days1932: 366 of 366 days1933: 365 of 365 days1934: 365 of 365 days1935: 365 of 365 days1936: 366 of 366 days1937: 365 of 365 days1938: 365 of 365 days1939: 365 of 365 days1940: 366 of 366 days1941: 365 of 365 days1942: 365 of 365 days1943: 364 of 365 days1944: 365 of 366 days1945: 365 of 365 days1946: 365 of 365 days1947: 365 of 365 days1948: 366 of 366 days1949: 365 of 365 days1950: 365 of 365 days1951: 365 of 365 days1952: 366 of 366 days1953: 365 of 365 days1954: 365 of 365 days1955: 365 of 365 days1956: 365 of 366 days1957: 365 of 365 days1958: 364 of 365 days1959: 365 of 365 days1960: 366 of 366 days1961: 365 of 365 days1962: 365 of 365 days1963: 365 of 365 days1964: 366 of 366 days1965: 365 of 365 days1966: 365 of 365 days1967: 365 of 365 days1968: 366 of 366 days1969: 365 of 365 days1970: 365 of 365 days1971: 365 of 365 days1972: 366 of 366 days1973: 364 of 365 days1974: 365 of 365 days1975: 365 of 365 days1976: 366 of 366 days1977: 365 of 365 days1978: 365 of 365 days1979: 365 of 365 days1980: 366 of 366 days1981: 365 of 365 days1982: 365 of 365 days1983: 365 of 365 days1984: 366 of 366 days1985: 365 of 365 days1986: 365 of 365 days1987: 364 of 365 days1988: 366 of 366 days1989: 364 of 365 days1990: 365 of 365 days1991: 365 of 365 days1992: 366 of 366 days1993: 365 of 365 days1994: 365 of 365 days1995: 365 of 365 days1996: 366 of 366 days1997: 365 of 365 days1998: 365 of 365 days1999: 365 of 365 days2000: 366 of 366 days2001: 365 of 365 days2002: 365 of 365 days2003: 365 of 365 days2004: 366 of 366 days2005: 365 of 365 days2006: 365 of 365 days2007: 365 of 365 days2008: 363 of 366 days2009: 342 of 365 days2010: 350 of 365 days2011: 365 of 365 days2012: 366 of 366 days2013: 365 of 365 days2014: 365 of 365 days2015: 365 of 365 days2016: 366 of 366 days2017: 365 of 365 days2018: 365 of 365 days2019: 365 of 365 days2020: 366 of 366 days2021: 365 of 365 days2022: 365 of 365 days2023: 365 of 365 days2024: 366 of 366 days2025: 365 of 365 days2026: 284 of 365 days1900192019401960198020002020
142 years of record at Blue Hill Coop, 1885 to 2026. 1 years have data for under 90 percent of days and are left out of rankings: 2026.
Days with data per year at Blue Hill Coop
YearDays with dataShare of yearComplete
188533492%Yes
1886365100%Yes
1887365100%Yes
1888366100%Yes
1889365100%Yes
1890365100%Yes
1891365100%Yes
1892366100%Yes
1893364100%Yes
1894364100%Yes
1895365100%Yes
1896365100%Yes
1897365100%Yes
1898365100%Yes
1899364100%Yes
1900365100%Yes
1901365100%Yes
1902365100%Yes
1903365100%Yes
1904366100%Yes
1905365100%Yes
1906365100%Yes
1907365100%Yes
1908366100%Yes
1909365100%Yes
1910365100%Yes
1911365100%Yes
1912366100%Yes
1913365100%Yes
1914365100%Yes
1915365100%Yes
1916366100%Yes
1917365100%Yes
1918365100%Yes
1919365100%Yes
1920366100%Yes
1921365100%Yes
1922365100%Yes
1923365100%Yes
1924366100%Yes
1925365100%Yes
1926365100%Yes
1927365100%Yes
1928366100%Yes
1929365100%Yes
1930365100%Yes
1931365100%Yes
1932366100%Yes
1933365100%Yes
1934365100%Yes
1935365100%Yes
1936366100%Yes
1937365100%Yes
1938365100%Yes
1939365100%Yes
1940366100%Yes
1941365100%Yes
1942365100%Yes
1943364100%Yes
1944365100%Yes
1945365100%Yes
1946365100%Yes
1947365100%Yes
1948366100%Yes
1949365100%Yes
1950365100%Yes
1951365100%Yes
1952366100%Yes
1953365100%Yes
1954365100%Yes
1955365100%Yes
1956365100%Yes
1957365100%Yes
1958364100%Yes
1959365100%Yes
1960366100%Yes
1961365100%Yes
1962365100%Yes
1963365100%Yes
1964366100%Yes
1965365100%Yes
1966365100%Yes
1967365100%Yes
1968366100%Yes
1969365100%Yes
1970365100%Yes
1971365100%Yes
1972366100%Yes
1973364100%Yes
1974365100%Yes
1975365100%Yes
1976366100%Yes
1977365100%Yes
1978365100%Yes
1979365100%Yes
1980366100%Yes
1981365100%Yes
1982365100%Yes
1983365100%Yes
1984366100%Yes
1985365100%Yes
1986365100%Yes
1987364100%Yes
1988366100%Yes
1989364100%Yes
1990365100%Yes
1991365100%Yes
1992366100%Yes
1993365100%Yes
1994365100%Yes
1995365100%Yes
1996366100%Yes
1997365100%Yes
1998365100%Yes
1999365100%Yes
2000366100%Yes
2001365100%Yes
2002365100%Yes
2003365100%Yes
2004366100%Yes
2005365100%Yes
2006365100%Yes
2007365100%Yes
200836399%Yes
200934294%Yes
201035096%Yes
2011365100%Yes
2012366100%Yes
2013365100%Yes
2014365100%Yes
2015365100%Yes
2016366100%Yes
2017365100%Yes
2018365100%Yes
2019365100%Yes
2020366100%Yes
2021365100%Yes
2022365100%Yes
2023365100%Yes
2024366100%Yes
2025365100%Yes
202628478%No

Latest Records

20
Latest records at Blue Hill Coop
DateStationRecordValueBeat old record byOld record stoodSignificance
28 September 2026Blue Hill Coop, USdaily rain (Provisional)91.7 mm (3.6 in)26.9 mm (1.1 in)64 years44 of 100 (Notable)
27 September 2026Blue Hill Coop, USdaily rain (Provisional)120.1 mm (4.7 in)62.4 mm (2.5 in)17 years52 of 100 (Notable)
7 August 2026Blue Hill Coop, USdaily high min (Tie)22.8 C (73.0 F)tie8 years3 of 100 (Routine)
8 July 2026Blue Hill Coop, USdaily rain50.8 mm (2.0 in)6.3 mm (0.25 in)41 years27 of 100 (Routine)
3 July 2026Blue Hill Coop, USdaily high min25.0 C (77.0 F)1.1 C (2.0 F)115 years43 of 100 (Notable)
3 July 2026Blue Hill Coop, USdaily high max (Tie)37.2 C (99.0 F)tie115 years10 of 100 (Routine)
2 July 2026Blue Hill Coop, USdaily high min (Tie)22.2 C (72.0 F)tie124 years10 of 100 (Routine)
20 May 2026Blue Hill Coop, USdaily high min18.3 C (64.9 F)1.6 C (2.9 F)123 years44 of 100 (Notable)
20 May 2026Blue Hill Coop, USdaily high max35.0 C (95.0 F)2.2 C (4.0 F)64 years32 of 100 (Routine)
15 April 2026Blue Hill Coop, USdaily high min14.4 C (57.9 F)1.1 C (2.0 F)12 years15 of 100 (Routine)
11 March 2026Blue Hill Coop, USdaily high max23.3 C (73.9 F)2.7 C (4.9 F)48 years28 of 100 (Routine)
10 March 2026Blue Hill Coop, USdaily high min8.9 C (48.0 F)1.1 C (2.0 F)5 years13 of 100 (Routine)
9 March 2026Blue Hill Coop, USdaily high min7.2 C (45.0 F)1.6 C (2.9 F)104 years43 of 100 (Notable)
24 February 2026Blue Hill Coop, USdaily snowfall34.8 cm (13.7 in)7.9 cm (3.1 in)59 years36 of 100 (Notable)
23 February 2026Blue Hill Coop, USdaily snowfall28.2 cm (11.1 in)9.1 cm (3.6 in)18 years25 of 100 (Routine)
26 January 2026Blue Hill Coop, USmonthly snowfall (Tie)54.4 cm (21.4 in)tie3 years5 of 100 (Routine)
7 October 2025Blue Hill Coop, USdaily high max (Tie)28.3 C (82.9 F)tie79 years8 of 100 (Routine)
31 July 2025Blue Hill Coop, USdaily high max (Tie)35.0 C (95.0 F)tie108 years10 of 100 (Routine)
10 July 2025Blue Hill Coop, USdaily rain82.0 mm (3.2 in)8.6 mm (0.34 in)4 years18 of 100 (Routine)
25 June 2025Blue Hill Coop, USdaily high min24.4 C (75.9 F)2.7 C (4.9 F)116 years47 of 100 (Notable)

Climate Trend

139 complete years, 1886 to 2025
Annual mean temperature at Blue Hill Coop as warming stripes, 1886 to 2025 One stripe for each of 139 complete years at Blue Hill Coop, 1886 to 2025. Blue stripes are years cooler than the station's own mean of 9.1 C (48.4 F); red stripes are warmer. The coolest year was 1888, at 6.9 C (44.4 F), and the warmest was 2012, at 11.3 C (52.3 F). The strongest colour marks a difference of 2.3 C (4.1 F). 1886: 7.9 C, -1.2 C from the station mean1887: 7.8 C, -1.3 C from the station mean1888: 6.9 C, -2.2 C from the station mean1889: 8.8 C, -0.4 C from the station mean1890: 8.0 C, -1.1 C from the station mean1891: 8.9 C, -0.2 C from the station mean1892: 8.2 C, -1.0 C from the station mean1893: 7.5 C, -1.6 C from the station mean1894: 8.9 C, -0.2 C from the station mean1895: 8.6 C, -0.6 C from the station mean1896: 8.3 C, -0.9 C from the station mean1897: 8.5 C, -0.6 C from the station mean1898: 9.0 C, -0.1 C from the station mean1899: 8.7 C, -0.4 C from the station mean1900: 9.2 C, +0.1 C from the station mean1901: 8.2 C, -0.9 C from the station mean1902: 8.7 C, -0.5 C from the station mean1903: 8.5 C, -0.6 C from the station mean1904: 7.0 C, -2.1 C from the station mean1905: 8.1 C, -1.0 C from the station mean1906: 8.7 C, -0.4 C from the station mean1907: 7.6 C, -1.6 C from the station mean1908: 9.3 C, +0.1 C from the station mean1909: 8.6 C, -0.5 C from the station mean1910: 8.9 C, -0.2 C from the station mean1911: 8.9 C, -0.2 C from the station mean1912: 8.5 C, -0.6 C from the station mean1913: 9.6 C, +0.5 C from the station mean1914: 8.1 C, -1.1 C from the station mean1915: 8.9 C, -0.3 C from the station mean1916: 7.9 C, -1.2 C from the station mean1917: 7.2 C, -2.0 C from the station mean1918: 8.2 C, -1.0 C from the station mean1919: 8.4 C, -0.8 C from the station mean1920: 7.6 C, -1.5 C from the station mean1921: 9.3 C, +0.1 C from the station mean1922: 9.0 C, -0.1 C from the station mean1923: 8.3 C, -0.9 C from the station mean1924: 8.4 C, -0.7 C from the station mean1925: 9.5 C, +0.4 C from the station mean1926: 8.0 C, -1.1 C from the station mean1927: 9.4 C, +0.3 C from the station mean1928: 9.0 C, -0.2 C from the station mean1929: 9.1 C, 0.0 C from the station mean1930: 9.5 C, +0.3 C from the station mean1931: 9.8 C, +0.7 C from the station mean1932: 9.4 C, +0.2 C from the station mean1933: 8.7 C, -0.4 C from the station mean1934: 8.2 C, -1.0 C from the station mean1935: 8.3 C, -0.9 C from the station mean1936: 8.5 C, -0.6 C from the station mean1937: 9.4 C, +0.2 C from the station mean1938: 9.5 C, +0.4 C from the station mean1939: 8.8 C, -0.3 C from the station mean1940: 7.7 C, -1.5 C from the station mean1941: 9.4 C, +0.2 C from the station mean1942: 9.2 C, 0.0 C from the station mean1943: 8.9 C, -0.3 C from the station mean1944: 9.4 C, +0.3 C from the station mean1945: 9.4 C, +0.3 C from the station mean1946: 9.8 C, +0.7 C from the station mean1947: 9.3 C, +0.2 C from the station mean1948: 9.1 C, -0.1 C from the station mean1949: 10.8 C, +1.6 C from the station mean1950: 9.3 C, +0.1 C from the station mean1951: 9.9 C, +0.7 C from the station mean1952: 10.1 C, +1.0 C from the station mean1953: 10.7 C, +1.5 C from the station mean1954: 9.3 C, +0.2 C from the station mean1955: 9.2 C, +0.1 C from the station mean1956: 8.9 C, -0.2 C from the station mean1957: 10.0 C, +0.8 C from the station mean1958: 8.4 C, -0.7 C from the station mean1959: 9.4 C, +0.2 C from the station mean1960: 9.1 C, -0.1 C from the station mean1961: 9.1 C, -0.1 C from the station mean1962: 8.3 C, -0.8 C from the station mean1963: 8.6 C, -0.5 C from the station mean1964: 8.9 C, -0.2 C from the station mean1965: 8.7 C, -0.4 C from the station mean1966: 9.1 C, 0.0 C from the station mean1967: 8.4 C, -0.8 C from the station mean1968: 8.7 C, -0.4 C from the station mean1969: 9.1 C, 0.0 C from the station mean1970: 8.8 C, -0.3 C from the station mean1971: 9.2 C, 0.0 C from the station mean1972: 8.2 C, -1.0 C from the station mean1973: 10.0 C, +0.8 C from the station mean1974: 9.0 C, -0.1 C from the station mean1975: 9.6 C, +0.5 C from the station mean1976: 8.9 C, -0.2 C from the station mean1977: 9.2 C, +0.1 C from the station mean1978: 8.4 C, -0.8 C from the station mean1979: 9.4 C, +0.3 C from the station mean1980: 8.7 C, -0.4 C from the station mean1981: 9.1 C, 0.0 C from the station mean1982: 8.7 C, -0.4 C from the station mean1983: 9.7 C, +0.6 C from the station mean1984: 9.6 C, +0.4 C from the station mean1985: 9.0 C, -0.1 C from the station mean1986: 8.9 C, -0.2 C from the station mean1987: 9.2 C, 0.0 C from the station mean1988: 9.3 C, +0.1 C from the station mean1989: 8.8 C, -0.4 C from the station mean1990: 10.4 C, +1.2 C from the station mean1991: 10.4 C, +1.2 C from the station mean1992: 8.5 C, -0.6 C from the station mean1993: 9.1 C, 0.0 C from the station mean1994: 9.5 C, +0.4 C from the station mean1995: 9.4 C, +0.3 C from the station mean1996: 9.1 C, -0.1 C from the station mean1997: 9.3 C, +0.1 C from the station mean1998: 10.7 C, +1.6 C from the station mean1999: 10.7 C, +1.6 C from the station mean2000: 9.1 C, 0.0 C from the station mean2001: 10.4 C, +1.3 C from the station mean2002: 10.1 C, +1.0 C from the station mean2003: 8.8 C, -0.4 C from the station mean2004: 9.0 C, -0.1 C from the station mean2005: 9.7 C, +0.6 C from the station mean2006: 10.7 C, +1.5 C from the station mean2007: 9.7 C, +0.6 C from the station mean2008: 10.0 C, +0.8 C from the station mean2009: 9.2 C, 0.0 C from the station mean2011: 10.5 C, +1.3 C from the station mean2012: 11.3 C, +2.1 C from the station mean2013: 10.0 C, +0.9 C from the station mean2014: 9.6 C, +0.4 C from the station mean2015: 9.9 C, +0.8 C from the station mean2016: 10.9 C, +1.7 C from the station mean2017: 10.3 C, +1.2 C from the station mean2018: 10.1 C, +0.9 C from the station mean2019: 9.6 C, +0.4 C from the station mean2020: 11.0 C, +1.8 C from the station mean2021: 10.7 C, +1.6 C from the station mean2022: 10.8 C, +1.7 C from the station mean2023: 11.2 C, +2.0 C from the station mean2024: 11.1 C, +1.9 C from the station mean2025: 10.2 C, +1.1 C from the station mean18861900191019201930194019501960197019801990200020102020
One stripe for each of 139 complete years at Blue Hill Coop, 1886 to 2025. Blue stripes are years cooler than the station's own mean of 9.1 C (48.4 F); red stripes are warmer. The coolest year was 1888, at 6.9 C (44.4 F), and the warmest was 2012, at 11.3 C (52.3 F). The strongest colour marks a difference of 2.3 C (4.1 F).
Annual mean temperature at Blue Hill Coop as warming stripes, 1886 to 2025
YearAnnual mean temperatureDifference from the station mean
18867.9 C-1.25 C
18877.8 C-1.33 C
18886.9 C-2.24 C
18898.8 C-0.38 C
18908.0 C-1.15 C
18918.9 C-0.24 C
18928.2 C-0.97 C
18937.5 C-1.62 C
18948.9 C-0.23 C
18958.6 C-0.59 C
18968.3 C-0.89 C
18978.5 C-0.64 C
18989.0 C-0.11 C
18998.7 C-0.43 C
19009.2 C+0.09 C
19018.2 C-0.94 C
19028.7 C-0.49 C
19038.5 C-0.61 C
19047.0 C-2.10 C
19058.1 C-1.04 C
19068.7 C-0.44 C
19077.6 C-1.58 C
19089.3 C+0.12 C
19098.6 C-0.51 C
19108.9 C-0.23 C
19118.9 C-0.23 C
19128.5 C-0.63 C
19139.6 C+0.48 C
19148.1 C-1.08 C
19158.9 C-0.26 C
19167.9 C-1.25 C
19177.2 C-1.97 C
19188.2 C-0.97 C
19198.4 C-0.77 C
19207.6 C-1.51 C
19219.3 C+0.13 C
19229.0 C-0.11 C
19238.3 C-0.86 C
19248.4 C-0.73 C
19259.5 C+0.35 C
19268.0 C-1.13 C
19279.4 C+0.25 C
19289.0 C-0.17 C
19299.1 C-0.05 C
19309.5 C+0.33 C
19319.8 C+0.65 C
19329.4 C+0.22 C
19338.7 C-0.40 C
19348.2 C-0.97 C
19358.3 C-0.86 C
19368.5 C-0.63 C
19379.4 C+0.22 C
19389.5 C+0.39 C
19398.8 C-0.32 C
19407.7 C-1.46 C
19419.4 C+0.22 C
19429.2 C+0.04 C
19438.9 C-0.28 C
19449.4 C+0.29 C
19459.4 C+0.27 C
19469.8 C+0.67 C
19479.3 C+0.17 C
19489.1 C-0.06 C
194910.8 C+1.61 C
19509.3 C+0.14 C
19519.9 C+0.71 C
195210.1 C+0.98 C
195310.7 C+1.52 C
19549.3 C+0.18 C
19559.2 C+0.09 C
19568.9 C-0.24 C
195710.0 C+0.82 C
19588.4 C-0.73 C
19599.4 C+0.22 C
19609.1 C-0.09 C
19619.1 C-0.09 C
19628.3 C-0.85 C
19638.6 C-0.50 C
19648.9 C-0.22 C
19658.7 C-0.45 C
19669.1 C-0.03 C
19678.4 C-0.78 C
19688.7 C-0.45 C
19699.1 C-0.01 C
19708.8 C-0.31 C
19719.2 C+0.04 C
19728.2 C-0.96 C
197310.0 C+0.83 C
19749.0 C-0.11 C
19759.6 C+0.47 C
19768.9 C-0.20 C
19779.2 C+0.05 C
19788.4 C-0.79 C
19799.4 C+0.28 C
19808.7 C-0.41 C
19819.1 C-0.03 C
19828.7 C-0.45 C
19839.7 C+0.58 C
19849.6 C+0.41 C
19859.0 C-0.15 C
19868.9 C-0.22 C
19879.2 C+0.03 C
19889.3 C+0.11 C
19898.8 C-0.36 C
199010.4 C+1.22 C
199110.4 C+1.24 C
19928.5 C-0.60 C
19939.1 C-0.01 C
19949.5 C+0.35 C
19959.4 C+0.26 C
19969.1 C-0.06 C
19979.3 C+0.14 C
199810.7 C+1.56 C
199910.7 C+1.57 C
20009.1 C-0.02 C
200110.4 C+1.26 C
200210.1 C+0.99 C
20038.8 C-0.36 C
20049.0 C-0.14 C
20059.7 C+0.58 C
200610.7 C+1.51 C
20079.7 C+0.55 C
200810.0 C+0.81 C
20099.2 C+0.01 C
201110.5 C+1.33 C
201211.3 C+2.13 C
201310.0 C+0.85 C
20149.6 C+0.41 C
20159.9 C+0.75 C
201610.9 C+1.72 C
201710.3 C+1.20 C
201810.1 C+0.94 C
20199.6 C+0.44 C
202011.0 C+1.82 C
202110.7 C+1.60 C
202210.8 C+1.67 C
202311.2 C+2.01 C
202411.1 C+1.91 C
202510.2 C+1.07 C

The annual mean temperature here has risen by 0.1 C (0.1 to 0.2) per decade over 1886 to 2025. In Fahrenheit: 0.3 F (0.2 to 0.3) per decade. The slope is a straight line fitted to 139 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Blue Hill Coop
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.1 C (0.1 to 0.2) per decade0.3 F (0.2 to 0.3) per decade1886 to 2025139Rise
Mean daily maximum0.2 C (0.1 to 0.2) per decade0.3 F (0.2 to 0.3) per decade1886 to 2025139Rise
Mean daily minimum0.1 C (0.1 to 0.2) per decade0.2 F (0.2 to 0.3) per decade1886 to 2025139Rise

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1885 to 2026
Yearly extremes at Blue Hill Coop: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)38.3 C (100.9 F)194934.2 C (93.5 F)142
Coldest night (TNn)-29.4 C (-20.9 F)1934-20.6 C (-5.1 F)142
Wettest day (Rx1day)205.0 mm (8.1 in)195572.1 mm (2.8 in)141
Wettest five days (Rx5day)349.5 mm (13.8 in)1955102.8 mm (4.0 in)141
Longest dry spell (CDD)45 days192416 days141

Hottest day (TXx)

Hottest day (TXx) at Blue Hill Coop by year The hottest day of the year at Blue Hill Coop, 1885 to 2026. The record is 38.3 C (100.9 F) in 1949, marked on the chart; the median year is 34.2 C (93.5 F). 3032343638401900192019401960198020002020Record: 38.3 C (100.9 F) in 1949
The hottest day of the year at Blue Hill Coop, 1885 to 2026. The record is 38.3 C (100.9 F) in 1949, marked on the chart; the median year is 34.2 C (93.5 F).
Hottest day (TXx) at Blue Hill Coop by year
YearHottest day (TXx)
188532.8 C (91.0 F)
188632.8 C (91.0 F)
188732.8 C (91.0 F)
188833.9 C (93.0 F)
188931.7 C (89.1 F)
189033.3 C (91.9 F)
189133.9 C (93.0 F)
189233.3 C (91.9 F)
189332.2 C (90.0 F)
189436.1 C (97.0 F)
189533.9 C (93.0 F)
189633.9 C (93.0 F)
189731.7 C (89.1 F)
189836.1 C (97.0 F)
189932.8 C (91.0 F)
190035.6 C (96.1 F)
190134.4 C (93.9 F)
190232.2 C (90.0 F)
190333.3 C (91.9 F)
190432.2 C (90.0 F)
190532.8 C (91.0 F)
190632.2 C (90.0 F)
190735.0 C (95.0 F)
190836.1 C (97.0 F)
190935.6 C (96.1 F)
191033.9 C (93.0 F)
191137.2 C (99.0 F)
191237.2 C (99.0 F)
191333.9 C (93.0 F)
191433.9 C (93.0 F)
191531.1 C (88.0 F)
191632.8 C (91.0 F)
191736.1 C (97.0 F)
191833.9 C (93.0 F)
191937.2 C (99.0 F)
192031.7 C (89.1 F)
192133.9 C (93.0 F)
192231.7 C (89.1 F)
192333.3 C (91.9 F)
192435.0 C (95.0 F)
192535.0 C (95.0 F)
192637.2 C (99.0 F)
192733.3 C (91.9 F)
192835.0 C (95.0 F)
192935.0 C (95.0 F)
193035.6 C (96.1 F)
193136.1 C (97.0 F)
193230.6 C (87.1 F)
193334.4 C (93.9 F)
193432.8 C (91.0 F)
193532.8 C (91.0 F)
193633.3 C (91.9 F)
193733.9 C (93.0 F)
193833.3 C (91.9 F)
193933.9 C (93.0 F)
194032.8 C (91.0 F)
194133.3 C (91.9 F)
194232.8 C (91.0 F)
194333.9 C (93.0 F)
194437.2 C (99.0 F)
194533.3 C (91.9 F)
194634.4 C (93.9 F)
194735.0 C (95.0 F)
194837.2 C (99.0 F)
194938.3 C (100.9 F)
195033.9 C (93.0 F)
195132.2 C (90.0 F)
195237.2 C (99.0 F)
195337.2 C (99.0 F)
195433.9 C (93.0 F)
195536.7 C (98.1 F)
195633.9 C (93.0 F)
195735.6 C (96.1 F)
195832.2 C (90.0 F)
195933.9 C (93.0 F)
196032.2 C (90.0 F)
196133.3 C (91.9 F)
196232.8 C (91.0 F)
196336.1 C (97.0 F)
196436.7 C (98.1 F)
196534.4 C (93.9 F)
196635.0 C (95.0 F)
196733.3 C (91.9 F)
196834.4 C (93.9 F)
196933.9 C (93.0 F)
197034.4 C (93.9 F)
197133.9 C (93.0 F)
197232.8 C (91.0 F)
197333.3 C (91.9 F)
197433.3 C (91.9 F)
197538.3 C (100.9 F)
197634.4 C (93.9 F)
197737.8 C (100.0 F)
197836.1 C (97.0 F)
197934.4 C (93.9 F)
198035.6 C (96.1 F)
198135.0 C (95.0 F)
198235.0 C (95.0 F)
198334.4 C (93.9 F)
198434.4 C (93.9 F)
198532.8 C (91.0 F)
198632.8 C (91.0 F)
198735.6 C (96.1 F)
198836.1 C (97.0 F)
198932.8 C (91.0 F)
199033.9 C (93.0 F)
199137.2 C (99.0 F)
199233.3 C (91.9 F)
199336.1 C (97.0 F)
199434.4 C (93.9 F)
199536.1 C (97.0 F)
199632.8 C (91.0 F)
199735.0 C (95.0 F)
199832.2 C (90.0 F)
199935.6 C (96.1 F)
200033.9 C (93.0 F)
200135.6 C (96.1 F)
200237.2 C (99.0 F)
200332.8 C (91.0 F)
200432.2 C (90.0 F)
200535.0 C (95.0 F)
200634.4 C (93.9 F)
200733.9 C (93.0 F)
200836.7 C (98.1 F)
200933.3 C (91.9 F)
201037.2 C (99.0 F)
201137.2 C (99.0 F)
201235.0 C (95.0 F)
201335.0 C (95.0 F)
201432.8 C (91.0 F)
201536.1 C (97.0 F)
201635.6 C (96.1 F)
201735.6 C (96.1 F)
201834.4 C (93.9 F)
201933.9 C (93.0 F)
202035.0 C (95.0 F)
202135.0 C (95.0 F)
202237.2 C (99.0 F)
202333.3 C (91.9 F)
202434.4 C (93.9 F)
202537.2 C (99.0 F)
202637.2 C (99.0 F)

Coldest night (TNn)

Coldest night (TNn) at Blue Hill Coop by year The coldest night of the year at Blue Hill Coop, 1885 to 2026. The record is -29.4 C (-20.9 F) in 1934, marked on the chart; the median year is -20.6 C (-5.1 F). -30-25-20-15-101900192019401960198020002020Record: -29.4 C (-20.9 F) in 1934
The coldest night of the year at Blue Hill Coop, 1885 to 2026. The record is -29.4 C (-20.9 F) in 1934, marked on the chart; the median year is -20.6 C (-5.1 F).
Coldest night (TNn) at Blue Hill Coop by year
YearColdest night (TNn)
1885-19.4 C (-2.9 F)
1886-26.1 C (-15.0 F)
1887-23.9 C (-11.0 F)
1888-23.9 C (-11.0 F)
1889-21.1 C (-6.0 F)
1890-18.3 C (-0.9 F)
1891-18.3 C (-0.9 F)
1892-19.4 C (-2.9 F)
1893-21.1 C (-6.0 F)
1894-23.9 C (-11.0 F)
1895-23.3 C (-9.9 F)
1896-26.7 C (-16.1 F)
1897-18.3 C (-0.9 F)
1898-20.6 C (-5.1 F)
1899-23.3 C (-9.9 F)
1900-22.2 C (-8.0 F)
1901-22.8 C (-9.0 F)
1902-25.6 C (-14.1 F)
1903-21.1 C (-6.0 F)
1904-23.3 C (-9.9 F)
1905-18.9 C (-2.0 F)
1906-20.6 C (-5.1 F)
1907-24.4 C (-11.9 F)
1908-20.6 C (-5.1 F)
1909-18.9 C (-2.0 F)
1910-22.2 C (-8.0 F)
1911-17.2 C (1.0 F)
1912-23.9 C (-11.0 F)
1913-19.4 C (-2.9 F)
1914-25.6 C (-14.1 F)
1915-17.8 C (0.0 F)
1916-20.6 C (-5.1 F)
1917-27.2 C (-17.0 F)
1918-25.6 C (-14.1 F)
1919-23.9 C (-11.0 F)
1920-24.4 C (-11.9 F)
1921-20.6 C (-5.1 F)
1922-23.3 C (-9.9 F)
1923-20.6 C (-5.1 F)
1924-24.4 C (-11.9 F)
1925-21.1 C (-6.0 F)
1926-18.9 C (-2.0 F)
1927-20.6 C (-5.1 F)
1928-21.7 C (-7.1 F)
1929-18.9 C (-2.0 F)
1930-21.1 C (-6.0 F)
1931-19.4 C (-2.9 F)
1932-20.0 C (-4.0 F)
1933-28.3 C (-18.9 F)
1934-29.4 C (-20.9 F)
1935-22.8 C (-9.0 F)
1936-18.9 C (-2.0 F)
1937-14.4 C (6.1 F)
1938-18.3 C (-0.9 F)
1939-17.8 C (0.0 F)
1940-20.0 C (-4.0 F)
1941-19.4 C (-2.9 F)
1942-26.7 C (-16.1 F)
1943-27.8 C (-18.0 F)
1944-17.2 C (1.0 F)
1945-22.2 C (-8.0 F)
1946-21.1 C (-6.0 F)
1947-16.1 C (3.0 F)
1948-22.2 C (-8.0 F)
1949-16.7 C (1.9 F)
1950-21.1 C (-6.0 F)
1951-18.3 C (-0.9 F)
1952-19.4 C (-2.9 F)
1953-15.0 C (5.0 F)
1954-21.1 C (-6.0 F)
1955-21.7 C (-7.1 F)
1956-17.8 C (0.0 F)
1957-26.7 C (-16.1 F)
1958-23.3 C (-9.9 F)
1959-19.4 C (-2.9 F)
1960-16.7 C (1.9 F)
1961-24.4 C (-11.9 F)
1962-22.8 C (-9.0 F)
1963-21.7 C (-7.1 F)
1964-16.1 C (3.0 F)
1965-22.8 C (-9.0 F)
1966-20.0 C (-4.0 F)
1967-23.3 C (-9.9 F)
1968-22.8 C (-9.0 F)
1969-16.1 C (3.0 F)
1970-20.6 C (-5.1 F)
1971-21.7 C (-7.1 F)
1972-20.6 C (-5.1 F)
1973-18.9 C (-2.0 F)
1974-21.7 C (-7.1 F)
1975-18.3 C (-0.9 F)
1976-23.3 C (-9.9 F)
1977-20.0 C (-4.0 F)
1978-19.4 C (-2.9 F)
1979-22.2 C (-8.0 F)
1980-24.4 C (-11.9 F)
1981-22.8 C (-9.0 F)
1982-23.3 C (-9.9 F)
1983-21.1 C (-6.0 F)
1984-18.3 C (-0.9 F)
1985-17.8 C (0.0 F)
1986-20.0 C (-4.0 F)
1987-21.7 C (-7.1 F)
1988-21.7 C (-7.1 F)
1989-18.3 C (-0.9 F)
1990-18.9 C (-2.0 F)
1991-17.2 C (1.0 F)
1992-17.8 C (0.0 F)
1993-20.6 C (-5.1 F)
1994-22.8 C (-9.0 F)
1995-20.6 C (-5.1 F)
1996-20.6 C (-5.1 F)
1997-20.6 C (-5.1 F)
1998-16.1 C (3.0 F)
1999-19.4 C (-2.9 F)
2000-20.0 C (-4.0 F)
2001-15.0 C (5.0 F)
2002-13.3 C (8.1 F)
2003-20.6 C (-5.1 F)
2004-24.4 C (-11.9 F)
2005-21.7 C (-7.1 F)
2006-15.6 C (3.9 F)
2007-18.3 C (-0.9 F)
2008-16.7 C (1.9 F)
2009-17.8 C (0.0 F)
2010-16.7 C (1.9 F)
2011-21.7 C (-7.1 F)
2012-15.6 C (3.9 F)
2013-17.8 C (0.0 F)
2014-20.0 C (-4.0 F)
2015-22.2 C (-8.0 F)
2016-25.6 C (-14.1 F)
2017-19.4 C (-2.9 F)
2018-22.2 C (-8.0 F)
2019-18.9 C (-2.0 F)
2020-15.6 C (3.9 F)
2021-16.7 C (1.9 F)
2022-17.8 C (0.0 F)
2023-25.6 C (-14.1 F)
2024-15.6 C (3.9 F)
2025-16.7 C (1.9 F)
2026-18.9 C (-2.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Blue Hill Coop by year The wettest day of the year at Blue Hill Coop, 1885 to 2026. The record is 205.0 mm (8.1 in) in 1955, marked on the chart; the median year is 72.1 mm (2.8 in). 0501001502002501900192019401960198020002020Record: 205.0 mm (8.1 in) in 1955
The wettest day of the year at Blue Hill Coop, 1885 to 2026. The record is 205.0 mm (8.1 in) in 1955, marked on the chart; the median year is 72.1 mm (2.8 in).
Wettest day (Rx1day) at Blue Hill Coop by year
YearWettest day (Rx1day)
1885n/a
1886123.2 mm (4.9 in)
188750.0 mm (2.0 in)
188897.5 mm (3.8 in)
188978.7 mm (3.1 in)
189081.0 mm (3.2 in)
189173.9 mm (2.9 in)
189250.8 mm (2.0 in)
189375.4 mm (3.0 in)
189450.8 mm (2.0 in)
1895149.1 mm (5.9 in)
189672.1 mm (2.8 in)
189755.4 mm (2.2 in)
189879.8 mm (3.1 in)
1899116.1 mm (4.6 in)
190057.2 mm (2.3 in)
190157.7 mm (2.3 in)
190248.8 mm (1.9 in)
190351.8 mm (2.0 in)
190499.8 mm (3.9 in)
190560.2 mm (2.4 in)
190663.0 mm (2.5 in)
190766.3 mm (2.6 in)
190843.9 mm (1.7 in)
190954.6 mm (2.1 in)
191083.1 mm (3.3 in)
191184.3 mm (3.3 in)
191235.1 mm (1.4 in)
191346.7 mm (1.8 in)
191437.3 mm (1.5 in)
1915113.3 mm (4.5 in)
191652.6 mm (2.1 in)
191750.3 mm (2.0 in)
191868.6 mm (2.7 in)
191977.7 mm (3.1 in)
192095.3 mm (3.8 in)
192195.0 mm (3.7 in)
192299.6 mm (3.9 in)
192341.9 mm (1.6 in)
1924148.6 mm (5.9 in)
192566.3 mm (2.6 in)
192684.3 mm (3.3 in)
192791.7 mm (3.6 in)
192851.3 mm (2.0 in)
192971.1 mm (2.8 in)
193079.2 mm (3.1 in)
193163.8 mm (2.5 in)
193292.5 mm (3.6 in)
1933130.0 mm (5.1 in)
193448.3 mm (1.9 in)
193569.6 mm (2.7 in)
193693.7 mm (3.7 in)
193745.7 mm (1.8 in)
193853.1 mm (2.1 in)
193990.9 mm (3.6 in)
194052.6 mm (2.1 in)
194144.2 mm (1.7 in)
194248.8 mm (1.9 in)
194345.2 mm (1.8 in)
194493.0 mm (3.7 in)
194566.3 mm (2.6 in)
194670.4 mm (2.8 in)
194786.1 mm (3.4 in)
194857.9 mm (2.3 in)
194934.5 mm (1.4 in)
195086.6 mm (3.4 in)
195154.1 mm (2.1 in)
195257.7 mm (2.3 in)
195363.8 mm (2.5 in)
1954132.8 mm (5.2 in)
1955205.0 mm (8.1 in)
195676.2 mm (3.0 in)
195741.9 mm (1.6 in)
195866.8 mm (2.6 in)
195949.5 mm (1.9 in)
196064.0 mm (2.5 in)
196182.0 mm (3.2 in)
1962136.1 mm (5.4 in)
196385.6 mm (3.4 in)
196454.6 mm (2.1 in)
196541.1 mm (1.6 in)
196651.6 mm (2.0 in)
196796.0 mm (3.8 in)
1968119.9 mm (4.7 in)
1969133.4 mm (5.3 in)
197068.8 mm (2.7 in)
197148.5 mm (1.9 in)
197281.0 mm (3.2 in)
197355.9 mm (2.2 in)
197467.8 mm (2.7 in)
197556.4 mm (2.2 in)
197672.4 mm (2.9 in)
197771.9 mm (2.8 in)
197870.1 mm (2.8 in)
197982.0 mm (3.2 in)
198056.9 mm (2.2 in)
198180.8 mm (3.2 in)
198272.9 mm (2.9 in)
198357.2 mm (2.3 in)
198492.2 mm (3.6 in)
198552.1 mm (2.1 in)
198669.3 mm (2.7 in)
198779.0 mm (3.1 in)
198869.6 mm (2.7 in)
198952.3 mm (2.1 in)
199076.7 mm (3.0 in)
199179.0 mm (3.1 in)
199294.2 mm (3.7 in)
199365.3 mm (2.6 in)
199462.5 mm (2.5 in)
199570.1 mm (2.8 in)
1996156.0 mm (6.1 in)
199791.7 mm (3.6 in)
1998154.9 mm (6.1 in)
1999142.0 mm (5.6 in)
200096.3 mm (3.8 in)
200170.9 mm (2.8 in)
200255.6 mm (2.2 in)
200373.7 mm (2.9 in)
200485.1 mm (3.4 in)
2005134.1 mm (5.3 in)
200681.8 mm (3.2 in)
200778.7 mm (3.1 in)
200885.3 mm (3.4 in)
200952.8 mm (2.1 in)
2010125.7 mm (4.9 in)
201160.7 mm (2.4 in)
201272.9 mm (2.9 in)
201398.6 mm (3.9 in)
2014124.0 mm (4.9 in)
201551.6 mm (2.0 in)
201642.4 mm (1.7 in)
201779.2 mm (3.1 in)
201884.3 mm (3.3 in)
201975.4 mm (3.0 in)
202083.1 mm (3.3 in)
2021101.6 mm (4.0 in)
202253.6 mm (2.1 in)
202359.9 mm (2.4 in)
202484.1 mm (3.3 in)
202593.0 mm (3.7 in)
2026120.1 mm (4.7 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Blue Hill Coop by year The wettest five days of the year at Blue Hill Coop, 1885 to 2026. The record is 349.5 mm (13.8 in) in 1955, marked on the chart; the median year is 102.8 mm (4.0 in). 01002003004001900192019401960198020002020Record: 349.5 mm (13.8 in) in 1955
The wettest five days of the year at Blue Hill Coop, 1885 to 2026. The record is 349.5 mm (13.8 in) in 1955, marked on the chart; the median year is 102.8 mm (4.0 in).
Wettest five days (Rx5day) at Blue Hill Coop by year
YearWettest five days (Rx5day)
1885n/a
1886155.7 mm (6.1 in)
188787.1 mm (3.4 in)
1888114.1 mm (4.5 in)
1889126.3 mm (5.0 in)
189088.2 mm (3.5 in)
189187.6 mm (3.4 in)
189295.5 mm (3.8 in)
1893102.8 mm (4.0 in)
189473.7 mm (2.9 in)
1895180.6 mm (7.1 in)
1896167.1 mm (6.6 in)
189772.4 mm (2.9 in)
189887.6 mm (3.4 in)
1899121.9 mm (4.8 in)
190097.1 mm (3.8 in)
190171.8 mm (2.8 in)
190294.3 mm (3.7 in)
190388.2 mm (3.5 in)
1904122.9 mm (4.8 in)
1905129.8 mm (5.1 in)
190688.9 mm (3.5 in)
190783.6 mm (3.3 in)
190884.8 mm (3.3 in)
190979.2 mm (3.1 in)
191092.5 mm (3.6 in)
1911140.0 mm (5.5 in)
191263.8 mm (2.5 in)
191376.8 mm (3.0 in)
191483.1 mm (3.3 in)
1915139.7 mm (5.5 in)
191681.8 mm (3.2 in)
191779.2 mm (3.1 in)
191890.7 mm (3.6 in)
191994.3 mm (3.7 in)
1920113.4 mm (4.5 in)
1921124.4 mm (4.9 in)
1922135.4 mm (5.3 in)
192379.0 mm (3.1 in)
1924150.6 mm (5.9 in)
1925119.1 mm (4.7 in)
1926104.4 mm (4.1 in)
1927118.7 mm (4.7 in)
192866.5 mm (2.6 in)
192997.8 mm (3.9 in)
193090.9 mm (3.6 in)
1931137.4 mm (5.4 in)
1932184.0 mm (7.2 in)
1933213.6 mm (8.4 in)
193473.2 mm (2.9 in)
193576.5 mm (3.0 in)
1936152.1 mm (6.0 in)
193792.7 mm (3.6 in)
1938203.5 mm (8.0 in)
1939100.5 mm (4.0 in)
194086.9 mm (3.4 in)
194162.8 mm (2.5 in)
194271.2 mm (2.8 in)
194368.1 mm (2.7 in)
1944193.6 mm (7.6 in)
194596.7 mm (3.8 in)
194681.3 mm (3.2 in)
1947101.1 mm (4.0 in)
1948113.0 mm (4.4 in)
194967.8 mm (2.7 in)
195090.4 mm (3.6 in)
195193.2 mm (3.7 in)
195283.3 mm (3.3 in)
1953120.4 mm (4.7 in)
1954161.2 mm (6.3 in)
1955349.5 mm (13.8 in)
1956158.5 mm (6.2 in)
195774.6 mm (2.9 in)
195891.9 mm (3.6 in)
195994.0 mm (3.7 in)
196091.0 mm (3.6 in)
1961165.9 mm (6.5 in)
1962227.0 mm (8.9 in)
1963106.6 mm (4.2 in)
196479.1 mm (3.1 in)
196554.6 mm (2.1 in)
196692.7 mm (3.6 in)
1967117.3 mm (4.6 in)
1968201.7 mm (7.9 in)
1969185.0 mm (7.3 in)
197093.7 mm (3.7 in)
197190.6 mm (3.6 in)
197297.0 mm (3.8 in)
1973111.3 mm (4.4 in)
197474.4 mm (2.9 in)
1975139.4 mm (5.5 in)
1976165.7 mm (6.5 in)
197797.2 mm (3.8 in)
1978121.9 mm (4.8 in)
1979122.7 mm (4.8 in)
198065.5 mm (2.6 in)
1981121.4 mm (4.8 in)
1982208.0 mm (8.2 in)
1983111.6 mm (4.4 in)
1984209.2 mm (8.2 in)
198584.7 mm (3.3 in)
1986119.4 mm (4.7 in)
1987140.6 mm (5.5 in)
1988134.2 mm (5.3 in)
1989130.5 mm (5.1 in)
1990110.0 mm (4.3 in)
1991146.6 mm (5.8 in)
1992173.9 mm (6.8 in)
199393.7 mm (3.7 in)
199496.8 mm (3.8 in)
199582.3 mm (3.2 in)
1996220.2 mm (8.7 in)
1997122.4 mm (4.8 in)
1998208.8 mm (8.2 in)
1999170.1 mm (6.7 in)
2000110.3 mm (4.3 in)
2001106.6 mm (4.2 in)
200290.7 mm (3.6 in)
200390.0 mm (3.5 in)
2004133.9 mm (5.3 in)
2005189.8 mm (7.5 in)
2006154.0 mm (6.1 in)
2007111.5 mm (4.4 in)
2008109.5 mm (4.3 in)
200985.6 mm (3.4 in)
2010239.9 mm (9.4 in)
201186.1 mm (3.4 in)
201283.6 mm (3.3 in)
2013158.8 mm (6.3 in)
2014161.6 mm (6.4 in)
201583.8 mm (3.3 in)
201663.5 mm (2.5 in)
2017102.1 mm (4.0 in)
201891.5 mm (3.6 in)
2019114.3 mm (4.5 in)
2020122.5 mm (4.8 in)
2021124.2 mm (4.9 in)
202270.2 mm (2.8 in)
202398.4 mm (3.9 in)
2024116.8 mm (4.6 in)
2025125.7 mm (4.9 in)
2026234.4 mm (9.2 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Blue Hill Coop by year The longest dry spell of the year at Blue Hill Coop, 1885 to 2026. The record is 45 days in 1924, marked on the chart; the median year is 16 days. 10203040501900192019401960198020002020Record: 45 days in 1924
The longest dry spell of the year at Blue Hill Coop, 1885 to 2026. The record is 45 days in 1924, marked on the chart; the median year is 16 days.
Longest dry spell (CDD) at Blue Hill Coop by year
YearLongest dry spell (CDD)
1885n/a
188619 days
188719 days
188810 days
188917 days
189023 days
189114 days
189213 days
189315 days
189417 days
189521 days
189614 days
189715 days
189812 days
189922 days
190026 days
190118 days
190215 days
190316 days
190418 days
190522 days
190615 days
190712 days
190822 days
190913 days
191014 days
191117 days
191219 days
191315 days
191425 days
191536 days
191610 days
191722 days
191818 days
191915 days
192015 days
192118 days
192220 days
192315 days
192445 days
192520 days
192612 days
192715 days
192817 days
192912 days
193030 days
193114 days
193214 days
193313 days
193417 days
193515 days
193615 days
193713 days
193813 days
193917 days
194011 days
194129 days
194215 days
194319 days
194418 days
194511 days
194620 days
194728 days
194819 days
194917 days
195025 days
195116 days
195220 days
195316 days
195413 days
195525 days
195615 days
195718 days
195821 days
195915 days
196017 days
196117 days
196214 days
196324 days
196417 days
196516 days
196614 days
196711 days
196818 days
196916 days
197015 days
197114 days
197212 days
197315 days
197415 days
197521 days
197620 days
197714 days
197823 days
197913 days
198015 days
198114 days
198219 days
198319 days
198419 days
198513 days
198615 days
198713 days
198816 days
198915 days
199020 days
199115 days
199215 days
199319 days
199416 days
199514 days
199614 days
199718 days
199814 days
199929 days
200011 days
200126 days
200216 days
200317 days
200423 days
200514 days
200617 days
200721 days
200819 days
200913 days
201015 days
201113 days
201213 days
201316 days
201412 days
201517 days
201615 days
201713 days
201814 days
201913 days
202017 days
202117 days
202212 days
202317 days
202418 days
202513 days
202616 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Frost Dates and Growing Season

139 years with a frost

Across 139 years with a frost, the median last spring frost at Blue Hill Coop falls on 22 April and the median first autumn frost on 21 October, which leaves a median of 181 days between them.

In 1995 to 2025 the median growing season was 194 days. That is 20 days more than in 1886 to 1915.

Fitted over all years, the growing season changes by +1.3 days per decade at this station.

Frost dates and growing season at Blue Hill Coop
MeasureMedian, all yearsEarliest period (1886 to 1915)Recent period (1995 to 2025)Recent against earliestFitted trend
Last spring frost22 April25 April17 April8 days earlier-0.6 days per decade
First autumn frost21 October17 October29 October12 days later+0.7 days per decade
Growing days181 days174 days194 days20 days more+1.3 days per decade

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Rainfall Return Levels

139 years, 1886 to 2025

A day with at least 70.6 mm (2.8 in) of rain is expected about once in 2 years. A day with at least 177.4 mm (7.0 in) of rain is expected about once in 100 years.

Rainfall return levels at Blue Hill Coop: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years70.6 mm (2.8 in)
5 years95.1 mm (3.7 in)
10 years112.8 mm (4.4 in)
25 years137.1 mm (5.4 in)
50 years156.7 mm (6.2 in)
100 years177.4 mm (7.0 in)

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 139 years of values from 1886 to 2025.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 205.0 mm (8.1 in) in 1955; 156.0 mm (6.1 in) in 1996; 154.9 mm (6.1 in) in 1998.

Station Changes

1 suspected

One change was suspected in the annual mean temperature of Blue Hill Coop, at 1972. Each is measured against neighbouring stations.

  • Relative to 5 neighbouring stations, the station's annual mean temperature from 1972 ran 0.1 C (0.2 F) lower than in the years before (possible change).
Suspected changes in the annual mean temperature at Blue Hill Coop, against neighbouring stations
YearShift (C)Shift (F)StrengthNeighbours
1972-0.1-0.2possible5

Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.

Climate Twins

2011 to 2025 against 1961 to 1990

Over 2011 to 2025, Blue Hill Coop had a mean temperature of 10.5 C (50.8 F) and 1,336.1 mm (52.6 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Westchester Co AP (United States, 250 km away), Mt Carmel (United States, 173 km away) and Suwa (Japan, 10,820 km away).

Climate twins of Blue Hill Coop: stations whose 1961 to 1990 climate is closest to its 2011 to 2025 climate
Twin stationCountryDistance awayMean temperature, 1961-1990Rain a year, 1961-1990Climate difference
Westchester Co APUnited States250 km (155 mi)10.4 C (50.7 F)1,240.5 mm (48.8 in)0.65
Mt CarmelUnited States173 km (107 mi)10.3 C (50.5 F)1,263.7 mm (49.8 in)0.67
SuwaJapan10,820 km (6,723 mi)10.9 C (51.5 F)1,332.6 mm (52.5 in)0.73

Twins are stations, not cities. A twin is one of the three stations at least 100 km away whose earlier climate is closest to this station's recent one, so a close match does not mean the two places look alike in other ways. A station move or a gap in a record can change that station's averages. The list describes past climate; it is not a forecast and does not say what caused any change. How twins are found, and a search for any station.

Download the Data

  • Data for Blue Hill Coop standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Blue Hill Coop threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-12 (12 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2026-10-13).