Built 2026-10-15 (15 October 2026)

Merrill Weather Records (USC00475364)

Record envelope, standing records and threshold days for Merrill (USC00475364), Wisconsin, United States, with 122 years of record.

Key Facts for Merrill

  • Merrill (USC00475364) is a weather station in Wisconsin, United States at 45.18 latitude and -89.66 longitude, 381 m (1,250 ft) above sea level.
  • The station reports from 1905 to 2026, 122 years of record.
  • 1,464 records set at Merrill still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Merrill set a daily record high minimum temperature of 21.7 C (71.1 F) on 15 July 2026.

About the Station

  • Location: Wisconsin, United States, 45.18 latitude, -89.66 longitude.
  • Elevation: 381 m (1,250 ft).
  • Period of record: 1905 to 2026, 122 years.
  • Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

2 days at or beyond a record
Daily record high and record low at Merrill, with 2026 drawn through them The band shows the record high and record low for each calendar day at Merrill. The lines show the 2026 daily maximum and minimum. 2 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -60-40-200204060 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Merrill. The lines show the 2026 daily maximum and minimum. 2 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Merrill, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan13.9 C (57.0 F)-44.4 C (-47.9 F)4.4 C (39.9 F)-35.6 C (-32.1 F)
Feb18.3 C (64.9 F)-41.1 C (-42.0 F)11.7 C (53.1 F)-23.3 C (-9.9 F)
Mar30.0 C (86.0 F)-37.2 C (-35.0 F)18.3 C (64.9 F)-20.0 C (-4.0 F)
Apr33.3 C (91.9 F)-20.6 C (-5.1 F)27.2 C (81.0 F)-10.6 C (12.9 F)
May40.0 C (104.0 F)-7.8 C (18.0 F)32.8 C (91.0 F)-4.4 C (24.1 F)
Jun40.0 C (104.0 F)-2.2 C (28.0 F)32.8 C (91.0 F)6.1 C (43.0 F)
Jul43.3 C (109.9 F)0.6 C (33.1 F)34.4 C (93.9 F)8.3 C (46.9 F)
Aug38.3 C (100.9 F)-1.1 C (30.0 F)30.6 C (87.1 F)6.1 C (43.0 F)
Sep36.1 C (97.0 F)-7.8 C (18.0 F)31.1 C (88.0 F)2.8 C (37.0 F)
Oct31.7 C (89.1 F)-15.6 C (3.9 F)22.2 C (72.0 F)0.6 C (33.1 F)
Nov23.9 C (75.0 F)-26.1 C (-15.0 F)n/an/a
Dec16.7 C (62.1 F)-35.0 C (-31.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Merrill by the year they were set 1,464 records at Merrill still stand. 1976 holds the most, with 35. 0102030401905: 71906: 201907: 131908: 131909: 261910: 231911: 141912: 131913: 261914: 101915: 201916: 151917: 121918: 81919: 121920: 121921: 121922: 101923: 261924: 141925: 131926: 101927: 81928: 181929: 131930: 251931: 251932: 121933: 251934: 271935: 91936: 241937: 141938: 61939: 131940: 101941: 81942: 91943: 31944: 191945: 141946: 61947: 181948: 221949: 41950: 111951: 131952: 161953: 131954: 71955: 101956: 111957: 21958: 31959: 51960: 81961: 31962: 151963: 121964: 81965: 131966: 71967: 61968: 171969: 51970: 41971: 61972: 121973: 91974: 121975: 111976: 351977: 201978: 101979: 121980: 51981: 71982: 141983: 141984: 61985: 151986: 171987: 71988: 61989: 151990: 61991: 191992: 151993: 51994: 121995: 131996: 111997: 111998: 91999: 102000: 182001: 72002: 82003: 92004: 82005: 52006: 122007: 152008: 52009: 112010: 72011: 42012: 222013: 102014: 222015: 112016: 42017: 82018: 72019: 92020: 102021: 132022: 82023: 152024: 92025: 82026: 51905191819311944195719701983199620092022
1,464 records at Merrill still stand. 1976 holds the most, with 35.
Standing records at Merrill by the year they were set
Year setStanding records
19057
190620
190713
190813
190926
191023
191114
191213
191326
191410
191520
191615
191712
19188
191912
192012
192112
192210
192326
192414
192513
192610
19278
192818
192913
193025
193125
193212
193325
193427
19359
193624
193714
19386
193913
194010
19418
19429
19433
194419
194514
19466
194718
194822
19494
195011
195113
195216
195313
19547
195510
195611
19572
19583
19595
19608
19613
196215
196312
19648
196513
19667
19676
196817
19695
19704
19716
197212
19739
197412
197511
197635
197720
197810
197912
19805
19817
198214
198314
19846
198515
198617
19877
19886
198915
19906
199119
199215
19935
199412
199513
199611
199711
19989
199910
200018
20017
20028
20039
20048
20055
200612
200715
20085
200911
20107
20114
201222
201310
201422
201511
20164
20178
20187
20199
202010
202113
20228
202315
20249
20258
20265

All-Time Record Progression

6 new records
When Merrill set new all-time records 6 all-time records were set at Merrill between 11 July 1936 and 2 March 2019. Each dot is a new record. Record high maximum temperatureRecord low maximum temperatureRecord snow depth11 July 1936: Record high maximum temperature 41.1 C (106.0 F)12 July 1936: Record high maximum temperature 41.7 C (107.1 F)13 July 1936: Record high maximum temperature 43.3 C (109.9 F)18 January 1962: Record low maximum temperature -28.9 C (-20.0 F)27 February 2019: Record snow depth 83.8 cm (33.0 in)2 March 2019: Record snow depth 96.5 cm (38.0 in)19501965198019952010
6 all-time records were set at Merrill between 11 July 1936 and 2 March 2019. Each dot is a new record.
When Merrill set new all-time records
DateKindDetail
1936-07-11Record high maximum temperatureRecord high maximum temperature 41.1 C (106.0 F)
1936-07-12Record high maximum temperatureRecord high maximum temperature 41.7 C (107.1 F)
1936-07-13Record high maximum temperatureRecord high maximum temperature 43.3 C (109.9 F)
1962-01-18Record low maximum temperatureRecord low maximum temperature -28.9 C (-20.0 F)
2019-02-27Record snow depthRecord snow depth 83.8 cm (33.0 in)
2019-03-02Record snow depthRecord snow depth 96.5 cm (38.0 in)

Wettest Day of Each Month

Jul: 149.9 mm (5.9 in)
Record daily precipitation for each month at Merrill The wettest day on record for each calendar month at Merrill. The most was 149.9 mm (5.9 in) on 23 July 1912. 050100150 Jan: 42.2 mm (1.7 in), 5 January 1939 Jan Feb: 52.1 mm (2.1 in), 12 February 1965 Feb Mar: 55.4 mm (2.2 in), 16 March 2016 Mar Apr: 56.1 mm (2.2 in), 30 April 1984 Apr May: 62.2 mm (2.4 in), 6 May 1936 May Jun: 110.5 mm (4.4 in), 24 June 1946 Jun Jul: 149.9 mm (5.9 in), 23 July 1912 Jul Aug: 95.0 mm (3.7 in), 24 August 1962 Aug Sep: 117.9 mm (4.6 in), 5 September 2018 Sep Oct: 76.2 mm (3.0 in), 6 October 1911 Oct Nov: 49.8 mm (2.0 in), 13 November 1949 Nov Dec: 50.8 mm (2.0 in), 4 December 1990 Dec
The wettest day on record for each calendar month at Merrill. The most was 149.9 mm (5.9 in) on 23 July 1912.
Record daily precipitation for each month at Merrill
MonthRecord daily precipitation (mm)Date
Jan42.2 mm (1.7 in)5 January 1939
Feb52.1 mm (2.1 in)12 February 1965
Mar55.4 mm (2.2 in)16 March 2016
Apr56.1 mm (2.2 in)30 April 1984
May62.2 mm (2.4 in)6 May 1936
Jun110.5 mm (4.4 in)24 June 1946
Jul149.9 mm (5.9 in)23 July 1912
Aug95.0 mm (3.7 in)24 August 1962
Sep117.9 mm (4.6 in)5 September 2018
Oct76.2 mm (3.0 in)6 October 1911
Nov49.8 mm (2.0 in)13 November 1949
Dec50.8 mm (2.0 in)4 December 1990

Period of Record Coverage

1905 to 2026
Days with data per year at Merrill 122 years of record at Merrill, 1905 to 2026. 19 years have data for under 90 percent of days and are left out of rankings: 1905, 1909, 1910, 1911, 1922, 1931, 1932, 1933 and others. 1905: 133 of 365 days1906: 364 of 365 days1907: 361 of 365 days1908: 361 of 366 days1909: 302 of 365 days1910: 264 of 365 days1911: 255 of 365 days1912: 351 of 366 days1913: 339 of 365 days1914: 332 of 365 days1915: 336 of 365 days1916: 342 of 366 days1917: 343 of 365 days1918: 346 of 365 days1919: 342 of 365 days1920: 346 of 366 days1921: 339 of 365 days1922: 302 of 365 days1923: 337 of 365 days1924: 345 of 366 days1925: 343 of 365 days1926: 339 of 365 days1927: 338 of 365 days1928: 334 of 366 days1929: 342 of 365 days1930: 344 of 365 days1931: 319 of 365 days1932: 304 of 366 days1933: 253 of 365 days1934: 227 of 365 days1935: 340 of 365 days1936: 340 of 366 days1937: 353 of 365 days1938: 365 of 365 days1939: 359 of 365 days1940: 366 of 366 days1941: 363 of 365 days1942: 364 of 365 days1943: 321 of 365 days1944: 365 of 366 days1945: 365 of 365 days1946: 364 of 365 days1947: 365 of 365 days1948: 349 of 366 days1949: 343 of 365 days1950: 261 of 365 days1951: 267 of 365 days1952: 365 of 366 days1953: 365 of 365 days1954: 365 of 365 days1955: 364 of 365 days1956: 365 of 366 days1957: 362 of 365 days1958: 363 of 365 days1959: 320 of 365 days1960: 347 of 366 days1961: 364 of 365 days1962: 338 of 365 days1963: 360 of 365 days1964: 364 of 366 days1965: 361 of 365 days1966: 360 of 365 days1967: 360 of 365 days1968: 328 of 366 days1969: 332 of 365 days1970: 305 of 365 days1971: 350 of 365 days1972: 328 of 366 days1973: 292 of 365 days1974: 252 of 365 days1975: 349 of 365 days1976: 363 of 366 days1977: 365 of 365 days1978: 365 of 365 days1979: 365 of 365 days1980: 365 of 366 days1981: 364 of 365 days1982: 363 of 365 days1983: 365 of 365 days1984: 365 of 366 days1985: 363 of 365 days1986: 365 of 365 days1987: 364 of 365 days1988: 365 of 366 days1989: 362 of 365 days1990: 364 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: 364 of 365 days1999: 365 of 365 days2000: 366 of 366 days2001: 352 of 365 days2002: 365 of 365 days2003: 365 of 365 days2004: 366 of 366 days2005: 365 of 365 days2006: 365 of 365 days2007: 364 of 365 days2008: 366 of 366 days2009: 365 of 365 days2010: 365 of 365 days2011: 365 of 365 days2012: 366 of 366 days2013: 365 of 365 days2014: 365 of 365 days2015: 365 of 365 days2016: 355 of 366 days2017: 365 of 365 days2018: 365 of 365 days2019: 364 of 365 days2020: 365 of 366 days2021: 365 of 365 days2022: 365 of 365 days2023: 365 of 365 days2024: 366 of 366 days2025: 365 of 365 days2026: 282 of 365 days192019401960198020002020
122 years of record at Merrill, 1905 to 2026. 19 years have data for under 90 percent of days and are left out of rankings: 1905, 1909, 1910, 1911, 1922, 1931, 1932, 1933 and others.
Days with data per year at Merrill
YearDays with dataShare of yearComplete
190513336%No
1906364100%Yes
190736199%Yes
190836199%Yes
190930283%No
191026472%No
191125570%No
191235196%Yes
191333993%Yes
191433291%Yes
191533692%Yes
191634293%Yes
191734394%Yes
191834695%Yes
191934294%Yes
192034695%Yes
192133993%Yes
192230283%No
192333792%Yes
192434594%Yes
192534394%Yes
192633993%Yes
192733893%Yes
192833491%Yes
192934294%Yes
193034494%Yes
193131987%No
193230483%No
193325369%No
193422762%No
193534093%Yes
193634093%Yes
193735397%Yes
1938365100%Yes
193935998%Yes
1940366100%Yes
194136399%Yes
1942364100%Yes
194332188%No
1944365100%Yes
1945365100%Yes
1946364100%Yes
1947365100%Yes
194834995%Yes
194934394%Yes
195026172%No
195126773%No
1952365100%Yes
1953365100%Yes
1954365100%Yes
1955364100%Yes
1956365100%Yes
195736299%Yes
195836399%Yes
195932088%No
196034795%Yes
1961364100%Yes
196233893%Yes
196336099%Yes
196436499%Yes
196536199%Yes
196636099%Yes
196736099%Yes
196832890%No
196933291%Yes
197030584%No
197135096%Yes
197232890%No
197329280%No
197425269%No
197534996%Yes
197636399%Yes
1977365100%Yes
1978365100%Yes
1979365100%Yes
1980365100%Yes
1981364100%Yes
198236399%Yes
1983365100%Yes
1984365100%Yes
198536399%Yes
1986365100%Yes
1987364100%Yes
1988365100%Yes
198936299%Yes
1990364100%Yes
1991365100%Yes
1992366100%Yes
1993365100%Yes
1994365100%Yes
1995365100%Yes
1996366100%Yes
1997365100%Yes
1998364100%Yes
1999365100%Yes
2000366100%Yes
200135296%Yes
2002365100%Yes
2003365100%Yes
2004366100%Yes
2005365100%Yes
2006365100%Yes
2007364100%Yes
2008366100%Yes
2009365100%Yes
2010365100%Yes
2011365100%Yes
2012366100%Yes
2013365100%Yes
2014365100%Yes
2015365100%Yes
201635597%Yes
2017365100%Yes
2018365100%Yes
2019364100%Yes
2020365100%Yes
2021365100%Yes
2022365100%Yes
2023365100%Yes
2024366100%Yes
2025365100%Yes
202628277%No

Latest Records

20
Latest records at Merrill
DateStationRecordValueBeat old record byOld record stoodSignificance
15 July 2026Merrill, USdaily high min21.7 C (71.1 F)0.6 C (1.1 F)88 years37 of 100 (Notable)
14 April 2026Merrill, USdaily high min11.1 C (52.0 F)1.1 C (2.0 F)88 years38 of 100 (Notable)
12 April 2026Merrill, USdaily rain40.6 mm (1.6 in)7.6 mm (0.30 in)24 years26 of 100 (Routine)
16 March 2026Merrill, USdaily snowfall23.1 cm (9.1 in)17.5 cm (6.9 in)12 years49 of 100 (Notable)
15 March 2026Merrill, USdaily snowfall (Tie)10.2 cm (4.0 in)tie87 years9 of 100 (Routine)
13 March 2026Merrill, USdaily snowfall20.3 cm (8.0 in)2.5 cm (1.0 in)85 years40 of 100 (Notable)
13 March 2026Merrill, USdaily rain17.3 mm (0.7 in)2.3 mm (0.09 in)79 years20 of 100 (Routine)
10 March 2026Merrill, USdaily high max17.2 C (63.0 F)2.8 C (5.0 F)4 years15 of 100 (Routine)
7 March 2026Merrill, USdaily high min (Tie)1.7 C (35.1 F)tie33 years5 of 100 (Routine)
17 February 2026Merrill, USdaily high max (Tie)11.7 C (53.1 F)tie110 years10 of 100 (Routine)
25 January 2026Merrill, USdaily low max-20.6 C (-5.1 F)2.3 C (4.1 F)90 years40 of 100 (Notable)
24 January 2026Merrill, USdaily low max-23.9 C (-11.0 F)3.9 C (7.0 F)39 years27 of 100 (Routine)
9 January 2026Merrill, USdaily rain20.8 mm (0.8 in)5.6 mm (0.22 in)10 years20 of 100 (Routine)
14 December 2025Merrill, USdaily low max-18.3 C (-0.9 F)1.1 C (2.0 F)108 years41 of 100 (Notable)
5 October 2025Merrill, USdaily high max28.3 C (82.9 F)0.5 C (0.9 F)112 years40 of 100 (Notable)
6 September 2025Merrill, USdaily low max12.8 C (55.0 F)1.6 C (2.9 F)8 years15 of 100 (Routine)
5 September 2025Merrill, USdaily low max12.8 C (55.0 F)2.2 C (4.0 F)120 years44 of 100 (Notable)
26 June 2025Merrill, USdaily rain40.4 mm (1.6 in)10.7 mm (0.4 in)11 years21 of 100 (Routine)
23 June 2025Merrill, USdaily high min23.9 C (75.0 F)5.0 C (9.0 F)26 years27 of 100 (Routine)
21 May 2025Merrill, USdaily low max8.9 C (48.0 F)0.5 C (0.9 F)94 years38 of 100 (Notable)

Climate Trend

97 complete years, 1906 to 2025
Annual mean temperature at Merrill as warming stripes, 1906 to 2025 One stripe for each of 97 complete years at Merrill, 1906 to 2025. Blue stripes are years cooler than the station's own mean of 5.6 C (42.1 F); red stripes are warmer. The coolest year was 2014, at 3.4 C (38.0 F), and the warmest was 2012, at 7.9 C (46.2 F). The strongest colour marks a difference of 2.3 C (4.1 F). 1906: 5.9 C, +0.3 C from the station mean1907: 4.7 C, -0.9 C from the station mean1908: 7.1 C, +1.5 C from the station mean1912: 5.2 C, -0.5 C from the station mean1913: 6.7 C, +1.1 C from the station mean1914: 6.2 C, +0.5 C from the station mean1915: 6.1 C, +0.5 C from the station mean1916: 5.2 C, -0.5 C from the station mean1917: 3.5 C, -2.1 C from the station mean1918: 5.7 C, +0.1 C from the station mean1919: 5.4 C, -0.2 C from the station mean1920: 5.6 C, 0.0 C from the station mean1921: 7.5 C, +1.9 C from the station mean1924: 4.4 C, -1.2 C from the station mean1925: 6.2 C, +0.6 C from the station mean1926: 4.9 C, -0.7 C from the station mean1927: 5.3 C, -0.3 C from the station mean1928: 5.9 C, +0.3 C from the station mean1929: 4.7 C, -0.9 C from the station mean1930: 6.8 C, +1.1 C from the station mean1935: 5.4 C, -0.3 C from the station mean1936: 5.1 C, -0.6 C from the station mean1937: 5.6 C, 0.0 C from the station mean1938: 6.9 C, +1.3 C from the station mean1939: 6.6 C, +1.0 C from the station mean1940: 5.5 C, -0.1 C from the station mean1941: 6.9 C, +1.3 C from the station mean1942: 6.4 C, +0.7 C from the station mean1944: 7.2 C, +1.5 C from the station mean1945: 5.4 C, -0.2 C from the station mean1946: 6.5 C, +0.9 C from the station mean1947: 5.6 C, 0.0 C from the station mean1952: 6.2 C, +0.5 C from the station mean1953: 6.7 C, +1.1 C from the station mean1954: 6.0 C, +0.4 C from the station mean1955: 5.9 C, +0.2 C from the station mean1956: 5.6 C, 0.0 C from the station mean1957: 5.7 C, +0.1 C from the station mean1958: 5.7 C, 0.0 C from the station mean1960: 5.9 C, +0.2 C from the station mean1961: 5.6 C, 0.0 C from the station mean1962: 4.9 C, -0.8 C from the station mean1963: 5.9 C, +0.2 C from the station mean1964: 6.5 C, +0.8 C from the station mean1965: 5.4 C, -0.3 C from the station mean1966: 5.6 C, -0.1 C from the station mean1967: 5.2 C, -0.4 C from the station mean1971: 5.4 C, -0.2 C from the station mean1975: 5.5 C, -0.1 C from the station mean1976: 3.6 C, -2.0 C from the station mean1977: 5.0 C, -0.7 C from the station mean1978: 3.8 C, -1.8 C from the station mean1979: 3.6 C, -2.0 C from the station mean1981: 5.3 C, -0.4 C from the station mean1982: 4.1 C, -1.5 C from the station mean1983: 5.5 C, -0.1 C from the station mean1984: 5.3 C, -0.3 C from the station mean1985: 4.2 C, -1.4 C from the station mean1986: 5.2 C, -0.4 C from the station mean1987: 7.0 C, +1.3 C from the station mean1988: 5.2 C, -0.5 C from the station mean1989: 4.0 C, -1.7 C from the station mean1990: 5.9 C, +0.2 C from the station mean1991: 5.4 C, -0.2 C from the station mean1992: 4.9 C, -0.7 C from the station mean1993: 4.3 C, -1.3 C from the station mean1994: 5.2 C, -0.5 C from the station mean1995: 5.0 C, -0.6 C from the station mean1996: 3.7 C, -1.9 C from the station mean1997: 5.0 C, -0.7 C from the station mean1998: 7.8 C, +2.2 C from the station mean1999: 6.4 C, +0.8 C from the station mean2000: 5.6 C, 0.0 C from the station mean2002: 6.0 C, +0.4 C from the station mean2003: 5.2 C, -0.5 C from the station mean2004: 5.1 C, -0.6 C from the station mean2005: 6.2 C, +0.6 C from the station mean2006: 6.7 C, +1.0 C from the station mean2007: 6.4 C, +0.8 C from the station mean2008: 4.6 C, -1.1 C from the station mean2009: 4.8 C, -0.9 C from the station mean2010: 6.9 C, +1.2 C from the station mean2011: 5.9 C, +0.2 C from the station mean2012: 7.9 C, +2.3 C from the station mean2013: 4.3 C, -1.4 C from the station mean2014: 3.4 C, -2.3 C from the station mean2015: 6.2 C, +0.5 C from the station mean2016: 7.3 C, +1.6 C from the station mean2017: 6.1 C, +0.5 C from the station mean2018: 5.5 C, -0.1 C from the station mean2019: 4.7 C, -0.9 C from the station mean2020: 6.2 C, +0.6 C from the station mean2021: 6.7 C, +1.1 C from the station mean2022: 5.0 C, -0.6 C from the station mean2023: 7.0 C, +1.4 C from the station mean2024: 7.8 C, +2.1 C from the station mean2025: 6.0 C, +0.3 C from the station mean190619201930194019501960197019801990200020102020
One stripe for each of 97 complete years at Merrill, 1906 to 2025. Blue stripes are years cooler than the station's own mean of 5.6 C (42.1 F); red stripes are warmer. The coolest year was 2014, at 3.4 C (38.0 F), and the warmest was 2012, at 7.9 C (46.2 F). The strongest colour marks a difference of 2.3 C (4.1 F).
Annual mean temperature at Merrill as warming stripes, 1906 to 2025
YearAnnual mean temperatureDifference from the station mean
19065.9 C+0.29 C
19074.7 C-0.94 C
19087.1 C+1.48 C
19125.2 C-0.45 C
19136.7 C+1.10 C
19146.2 C+0.53 C
19156.1 C+0.46 C
19165.2 C-0.45 C
19173.5 C-2.10 C
19185.7 C+0.11 C
19195.4 C-0.21 C
19205.6 C0.00 C
19217.5 C+1.90 C
19244.4 C-1.22 C
19256.2 C+0.56 C
19264.9 C-0.73 C
19275.3 C-0.31 C
19285.9 C+0.27 C
19294.7 C-0.94 C
19306.8 C+1.14 C
19355.4 C-0.27 C
19365.1 C-0.56 C
19375.6 C-0.01 C
19386.9 C+1.31 C
19396.6 C+0.96 C
19405.5 C-0.12 C
19416.9 C+1.31 C
19426.4 C+0.74 C
19447.2 C+1.52 C
19455.4 C-0.21 C
19466.5 C+0.88 C
19475.6 C-0.01 C
19526.2 C+0.55 C
19536.7 C+1.08 C
19546.0 C+0.40 C
19555.9 C+0.25 C
19565.6 C0.00 C
19575.7 C+0.11 C
19585.7 C+0.03 C
19605.9 C+0.25 C
19615.6 C-0.02 C
19624.9 C-0.76 C
19635.9 C+0.24 C
19646.5 C+0.83 C
19655.4 C-0.27 C
19665.6 C-0.07 C
19675.2 C-0.43 C
19715.4 C-0.20 C
19755.5 C-0.09 C
19763.6 C-2.01 C
19775.0 C-0.67 C
19783.8 C-1.81 C
19793.6 C-2.03 C
19815.3 C-0.38 C
19824.1 C-1.51 C
19835.5 C-0.09 C
19845.3 C-0.30 C
19854.2 C-1.43 C
19865.2 C-0.42 C
19877.0 C+1.32 C
19885.2 C-0.47 C
19894.0 C-1.67 C
19905.9 C+0.22 C
19915.4 C-0.23 C
19924.9 C-0.73 C
19934.3 C-1.29 C
19945.2 C-0.46 C
19955.0 C-0.60 C
19963.7 C-1.90 C
19975.0 C-0.68 C
19987.8 C+2.17 C
19996.4 C+0.77 C
20005.6 C-0.01 C
20026.0 C+0.38 C
20035.2 C-0.46 C
20045.1 C-0.58 C
20056.2 C+0.56 C
20066.7 C+1.02 C
20076.4 C+0.77 C
20084.6 C-1.05 C
20094.8 C-0.88 C
20106.9 C+1.22 C
20115.9 C+0.24 C
20127.9 C+2.26 C
20134.3 C-1.35 C
20143.4 C-2.28 C
20156.2 C+0.55 C
20167.3 C+1.64 C
20176.1 C+0.47 C
20185.5 C-0.11 C
20194.7 C-0.89 C
20206.2 C+0.57 C
20216.7 C+1.06 C
20225.0 C-0.60 C
20237.0 C+1.36 C
20247.8 C+2.15 C
20256.0 C+0.32 C

The fitted trend in annual mean temperature here over 1906 to 2025 is -0.01 C (-0.06 to 0.05) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.01 F (-0.12 to 0.09) per decade. The slope is a straight line fitted to 97 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Merrill
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature-0.01 C (-0.06 to 0.05) per decade-0.01 F (-0.12 to 0.09) per decade1906 to 202597Not clearly different from zero
Mean daily maximum-0.08 C (-0.13 to -0.02) per decade-0.14 F (-0.24 to -0.04) per decade1906 to 202597Fall
Mean daily minimum0.06 C (-0.01 to 0.13) per decade0.11 F (-0.01 to 0.23) per decade1906 to 202597Not clearly different from zero

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

1905 to 2026
Yearly extremes at Merrill: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)43.3 C (109.9 F)193633.9 C (93.0 F)122
Coldest night (TNn)-44.4 C (-47.9 F)1909-32.2 C (-26.0 F)122
Wettest day (Rx1day)149.9 mm (5.9 in)191250.7 mm (2.0 in)122
Wettest five days (Rx5day)285.8 mm (11.3 in)191281.8 mm (3.2 in)122
Longest dry spell (CDD)46 days194321 days122

Hottest day (TXx)

Hottest day (TXx) at Merrill by year The hottest day of the year at Merrill, 1905 to 2026. The record is 43.3 C (109.9 F) in 1936, marked on the chart; the median year is 33.9 C (93.0 F). 30354045192019401960198020002020Record: 43.3 C (109.9 F) in 1936
The hottest day of the year at Merrill, 1905 to 2026. The record is 43.3 C (109.9 F) in 1936, marked on the chart; the median year is 33.9 C (93.0 F).
Hottest day (TXx) at Merrill by year
YearHottest day (TXx)
190531.7 C (89.1 F)
190635.0 C (95.0 F)
190731.7 C (89.1 F)
190835.0 C (95.0 F)
190936.1 C (97.0 F)
191037.8 C (100.0 F)
191136.7 C (98.1 F)
191237.2 C (99.0 F)
191335.0 C (95.0 F)
191434.4 C (93.9 F)
191532.8 C (91.0 F)
191637.2 C (99.0 F)
191739.4 C (102.9 F)
191836.1 C (97.0 F)
191934.4 C (93.9 F)
192033.9 C (93.0 F)
192137.8 C (100.0 F)
192232.8 C (91.0 F)
192334.4 C (93.9 F)
192433.3 C (91.9 F)
192536.1 C (97.0 F)
192633.3 C (91.9 F)
192733.9 C (93.0 F)
192834.4 C (93.9 F)
192934.4 C (93.9 F)
193035.6 C (96.1 F)
193137.8 C (100.0 F)
193237.8 C (100.0 F)
193338.3 C (100.9 F)
193440.0 C (104.0 F)
193535.0 C (95.0 F)
193643.3 C (109.9 F)
193738.3 C (100.9 F)
193835.0 C (95.0 F)
193935.6 C (96.1 F)
194035.0 C (95.0 F)
194134.4 C (93.9 F)
194233.3 C (91.9 F)
194333.3 C (91.9 F)
194435.6 C (96.1 F)
194533.9 C (93.0 F)
194631.7 C (89.1 F)
194736.7 C (98.1 F)
194836.1 C (97.0 F)
194934.4 C (93.9 F)
195031.7 C (89.1 F)
195130.6 C (87.1 F)
195233.3 C (91.9 F)
195333.9 C (93.0 F)
195431.7 C (89.1 F)
195536.7 C (98.1 F)
195634.4 C (93.9 F)
195733.3 C (91.9 F)
195831.7 C (89.1 F)
195934.4 C (93.9 F)
196032.2 C (90.0 F)
196132.8 C (91.0 F)
196231.7 C (89.1 F)
196335.6 C (96.1 F)
196436.1 C (97.0 F)
196532.8 C (91.0 F)
196634.4 C (93.9 F)
196731.1 C (88.0 F)
196833.9 C (93.0 F)
196932.8 C (91.0 F)
197036.1 C (97.0 F)
197135.0 C (95.0 F)
197231.7 C (89.1 F)
197336.1 C (97.0 F)
197430.0 C (86.0 F)
197535.0 C (95.0 F)
197633.3 C (91.9 F)
197735.0 C (95.0 F)
197832.8 C (91.0 F)
197931.7 C (89.1 F)
198033.3 C (91.9 F)
198131.7 C (89.1 F)
198232.2 C (90.0 F)
198333.9 C (93.0 F)
198432.8 C (91.0 F)
198532.8 C (91.0 F)
198633.3 C (91.9 F)
198735.0 C (95.0 F)
198836.7 C (98.1 F)
198933.9 C (93.0 F)
199032.2 C (90.0 F)
199132.8 C (91.0 F)
199232.2 C (90.0 F)
199331.7 C (89.1 F)
199432.8 C (91.0 F)
199537.8 C (100.0 F)
199632.2 C (90.0 F)
199731.7 C (89.1 F)
199832.8 C (91.0 F)
199936.1 C (97.0 F)
200032.8 C (91.0 F)
200133.9 C (93.0 F)
200235.6 C (96.1 F)
200332.8 C (91.0 F)
200430.6 C (87.1 F)
200534.4 C (93.9 F)
200636.7 C (98.1 F)
200733.3 C (91.9 F)
200831.7 C (89.1 F)
200935.0 C (95.0 F)
201033.3 C (91.9 F)
201135.0 C (95.0 F)
201236.1 C (97.0 F)
201333.3 C (91.9 F)
201430.6 C (87.1 F)
201532.2 C (90.0 F)
201633.9 C (93.0 F)
201731.7 C (89.1 F)
201835.0 C (95.0 F)
201931.7 C (89.1 F)
202033.3 C (91.9 F)
202134.4 C (93.9 F)
202234.4 C (93.9 F)
202335.0 C (95.0 F)
202433.3 C (91.9 F)
202533.9 C (93.0 F)
202634.4 C (93.9 F)

Coldest night (TNn)

Coldest night (TNn) at Merrill by year The coldest night of the year at Merrill, 1905 to 2026. The record is -44.4 C (-47.9 F) in 1909, marked on the chart; the median year is -32.2 C (-26.0 F). -50-40-30-20192019401960198020002020Record: -44.4 C (-47.9 F) in 1909
The coldest night of the year at Merrill, 1905 to 2026. The record is -44.4 C (-47.9 F) in 1909, marked on the chart; the median year is -32.2 C (-26.0 F).
Coldest night (TNn) at Merrill by year
YearColdest night (TNn)
1905-22.2 C (-8.0 F)
1906-34.4 C (-29.9 F)
1907-41.1 C (-42.0 F)
1908-36.7 C (-34.1 F)
1909-44.4 C (-47.9 F)
1910-36.1 C (-33.0 F)
1911-25.6 C (-14.1 F)
1912-41.1 C (-42.0 F)
1913-32.8 C (-27.0 F)
1914-33.9 C (-29.0 F)
1915-36.7 C (-34.1 F)
1916-33.3 C (-27.9 F)
1917-36.1 C (-33.0 F)
1918-38.3 C (-36.9 F)
1919-31.7 C (-25.1 F)
1920-32.8 C (-27.0 F)
1921-31.7 C (-25.1 F)
1922-37.8 C (-36.0 F)
1923-34.4 C (-29.9 F)
1924-34.4 C (-29.9 F)
1925-33.9 C (-29.0 F)
1926-31.1 C (-24.0 F)
1927-36.7 C (-34.1 F)
1928-35.0 C (-31.0 F)
1929-37.2 C (-35.0 F)
1930-32.8 C (-27.0 F)
1931-27.2 C (-17.0 F)
1932-30.6 C (-23.1 F)
1933-36.1 C (-33.0 F)
1934-30.0 C (-22.0 F)
1935-37.2 C (-35.0 F)
1936-39.4 C (-38.9 F)
1937-33.9 C (-29.0 F)
1938-36.1 C (-33.0 F)
1939-30.6 C (-23.1 F)
1940-30.6 C (-23.1 F)
1941-31.1 C (-24.0 F)
1942-32.8 C (-27.0 F)
1943-31.1 C (-24.0 F)
1944-27.2 C (-17.0 F)
1945-31.7 C (-25.1 F)
1946-32.8 C (-27.0 F)
1947-30.0 C (-22.0 F)
1948-38.9 C (-38.0 F)
1949-30.0 C (-22.0 F)
1950-38.3 C (-36.9 F)
1951-33.3 C (-27.9 F)
1952-32.2 C (-26.0 F)
1953-29.4 C (-20.9 F)
1954-33.9 C (-29.0 F)
1955-31.7 C (-25.1 F)
1956-30.6 C (-23.1 F)
1957-30.0 C (-22.0 F)
1958-29.4 C (-20.9 F)
1959-32.8 C (-27.0 F)
1960-26.7 C (-16.1 F)
1961-28.3 C (-18.9 F)
1962-37.2 C (-35.0 F)
1963-36.7 C (-34.1 F)
1964-27.8 C (-18.0 F)
1965-33.3 C (-27.9 F)
1966-33.3 C (-27.9 F)
1967-37.8 C (-36.0 F)
1968-31.7 C (-25.1 F)
1969-28.9 C (-20.0 F)
1970-32.8 C (-27.0 F)
1971-38.9 C (-38.0 F)
1972-38.9 C (-38.0 F)
1973-31.1 C (-24.0 F)
1974-36.1 C (-33.0 F)
1975-35.0 C (-31.0 F)
1976-34.4 C (-29.9 F)
1977-39.4 C (-38.9 F)
1978-31.7 C (-25.1 F)
1979-38.9 C (-38.0 F)
1980-29.4 C (-20.9 F)
1981-31.1 C (-24.0 F)
1982-42.8 C (-45.0 F)
1983-35.0 C (-31.0 F)
1984-36.1 C (-33.0 F)
1985-36.1 C (-33.0 F)
1986-30.6 C (-23.1 F)
1987-29.4 C (-20.9 F)
1988-33.9 C (-29.0 F)
1989-32.2 C (-26.0 F)
1990-31.7 C (-25.1 F)
1991-31.7 C (-25.1 F)
1992-27.2 C (-17.0 F)
1993-28.3 C (-18.9 F)
1994-37.2 C (-35.0 F)
1995-28.3 C (-18.9 F)
1996-40.6 C (-41.1 F)
1997-32.2 C (-26.0 F)
1998-28.9 C (-20.0 F)
1999-30.6 C (-23.1 F)
2000-31.1 C (-24.0 F)
2001-28.3 C (-18.9 F)
2002-26.7 C (-16.1 F)
2003-30.6 C (-23.1 F)
2004-30.0 C (-22.0 F)
2005-29.4 C (-20.9 F)
2006-31.1 C (-24.0 F)
2007-30.6 C (-23.1 F)
2008-30.6 C (-23.1 F)
2009-35.0 C (-31.0 F)
2010-27.2 C (-17.0 F)
2011-30.0 C (-22.0 F)
2012-27.2 C (-17.0 F)
2013-29.4 C (-20.9 F)
2014-32.8 C (-27.0 F)
2015-30.6 C (-23.1 F)
2016-28.3 C (-18.9 F)
2017-30.0 C (-22.0 F)
2018-28.9 C (-20.0 F)
2019-33.3 C (-27.9 F)
2020-29.4 C (-20.9 F)
2021-32.2 C (-26.0 F)
2022-32.8 C (-27.0 F)
2023-30.6 C (-23.1 F)
2024-24.4 C (-11.9 F)
2025-30.6 C (-23.1 F)
2026-35.6 C (-32.1 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Merrill by year The wettest day of the year at Merrill, 1905 to 2026. The record is 149.9 mm (5.9 in) in 1912, marked on the chart; the median year is 50.7 mm (2.0 in). 050100150192019401960198020002020Record: 149.9 mm (5.9 in) in 1912
The wettest day of the year at Merrill, 1905 to 2026. The record is 149.9 mm (5.9 in) in 1912, marked on the chart; the median year is 50.7 mm (2.0 in).
Wettest day (Rx1day) at Merrill by year
YearWettest day (Rx1day)
190527.4 mm (1.1 in)
190677.0 mm (3.0 in)
190795.3 mm (3.8 in)
190871.1 mm (2.8 in)
190963.8 mm (2.5 in)
191031.5 mm (1.2 in)
191176.2 mm (3.0 in)
1912149.9 mm (5.9 in)
191354.1 mm (2.1 in)
191465.5 mm (2.6 in)
191545.5 mm (1.8 in)
191641.4 mm (1.6 in)
191730.7 mm (1.2 in)
191846.0 mm (1.8 in)
191937.6 mm (1.5 in)
192041.4 mm (1.6 in)
192132.5 mm (1.3 in)
192279.0 mm (3.1 in)
192348.8 mm (1.9 in)
192438.9 mm (1.5 in)
192542.4 mm (1.7 in)
192657.7 mm (2.3 in)
192783.8 mm (3.3 in)
192846.7 mm (1.8 in)
192929.7 mm (1.2 in)
193067.6 mm (2.7 in)
193135.8 mm (1.4 in)
193253.3 mm (2.1 in)
193326.7 mm (1.1 in)
193442.7 mm (1.7 in)
193545.5 mm (1.8 in)
193662.2 mm (2.4 in)
193747.8 mm (1.9 in)
193886.4 mm (3.4 in)
193957.9 mm (2.3 in)
194062.5 mm (2.5 in)
194178.7 mm (3.1 in)
194250.5 mm (2.0 in)
194379.8 mm (3.1 in)
194442.2 mm (1.7 in)
194534.3 mm (1.4 in)
1946110.5 mm (4.4 in)
194779.2 mm (3.1 in)
194830.2 mm (1.2 in)
194953.3 mm (2.1 in)
195026.9 mm (1.1 in)
195147.0 mm (1.9 in)
195249.8 mm (2.0 in)
195374.2 mm (2.9 in)
195447.0 mm (1.9 in)
195546.0 mm (1.8 in)
195652.6 mm (2.1 in)
195730.2 mm (1.2 in)
195852.6 mm (2.1 in)
195983.3 mm (3.3 in)
196055.9 mm (2.2 in)
196146.7 mm (1.8 in)
196295.0 mm (3.7 in)
196341.4 mm (1.6 in)
196444.2 mm (1.7 in)
196563.5 mm (2.5 in)
196655.1 mm (2.2 in)
196788.4 mm (3.5 in)
196865.3 mm (2.6 in)
196937.6 mm (1.5 in)
197061.7 mm (2.4 in)
197149.8 mm (2.0 in)
197265.5 mm (2.6 in)
197355.1 mm (2.2 in)
197428.7 mm (1.1 in)
197550.8 mm (2.0 in)
197654.1 mm (2.1 in)
197745.2 mm (1.8 in)
197855.1 mm (2.2 in)
197993.5 mm (3.7 in)
198062.2 mm (2.4 in)
198142.2 mm (1.7 in)
198243.4 mm (1.7 in)
198349.5 mm (1.9 in)
198456.1 mm (2.2 in)
198557.2 mm (2.3 in)
198671.6 mm (2.8 in)
198724.6 mm (1.0 in)
198846.0 mm (1.8 in)
198923.1 mm (0.9 in)
199082.8 mm (3.3 in)
199145.7 mm (1.8 in)
199239.1 mm (1.5 in)
1993100.3 mm (3.9 in)
199456.6 mm (2.2 in)
199550.3 mm (2.0 in)
199638.6 mm (1.5 in)
199753.1 mm (2.1 in)
199857.7 mm (2.3 in)
199950.3 mm (2.0 in)
200048.3 mm (1.9 in)
200185.1 mm (3.4 in)
200254.9 mm (2.2 in)
200336.3 mm (1.4 in)
200439.1 mm (1.5 in)
200532.0 mm (1.3 in)
200669.9 mm (2.8 in)
200744.7 mm (1.8 in)
200829.2 mm (1.1 in)
200950.5 mm (2.0 in)
201080.0 mm (3.1 in)
201170.6 mm (2.8 in)
201258.9 mm (2.3 in)
201352.8 mm (2.1 in)
201444.5 mm (1.8 in)
201587.1 mm (3.4 in)
201655.4 mm (2.2 in)
201761.0 mm (2.4 in)
2018117.9 mm (4.6 in)
201940.4 mm (1.6 in)
202062.7 mm (2.5 in)
202177.5 mm (3.1 in)
202242.4 mm (1.7 in)
202346.2 mm (1.8 in)
202437.6 mm (1.5 in)
202543.7 mm (1.7 in)
202640.6 mm (1.6 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Merrill by year The wettest five days of the year at Merrill, 1905 to 2026. The record is 285.8 mm (11.3 in) in 1912, marked on the chart; the median year is 81.8 mm (3.2 in). 0100200300192019401960198020002020Record: 285.8 mm (11.3 in) in 1912
The wettest five days of the year at Merrill, 1905 to 2026. The record is 285.8 mm (11.3 in) in 1912, marked on the chart; the median year is 81.8 mm (3.2 in).
Wettest five days (Rx5day) at Merrill by year
YearWettest five days (Rx5day)
190545.4 mm (1.8 in)
1906108.8 mm (4.3 in)
1907138.8 mm (5.5 in)
1908103.7 mm (4.1 in)
190992.7 mm (3.6 in)
191060.1 mm (2.4 in)
1911116.8 mm (4.6 in)
1912285.8 mm (11.3 in)
191363.2 mm (2.5 in)
1914100.5 mm (4.0 in)
191561.5 mm (2.4 in)
191660.4 mm (2.4 in)
191757.6 mm (2.3 in)
191867.1 mm (2.6 in)
191964.2 mm (2.5 in)
192069.0 mm (2.7 in)
192158.9 mm (2.3 in)
192281.8 mm (3.2 in)
192381.3 mm (3.2 in)
192454.6 mm (2.1 in)
192585.2 mm (3.4 in)
192695.3 mm (3.8 in)
1927104.6 mm (4.1 in)
1928141.2 mm (5.6 in)
192955.6 mm (2.2 in)
193087.6 mm (3.4 in)
193175.0 mm (3.0 in)
193268.2 mm (2.7 in)
193349.2 mm (1.9 in)
193479.5 mm (3.1 in)
193572.2 mm (2.8 in)
193688.9 mm (3.5 in)
193771.1 mm (2.8 in)
1938144.3 mm (5.7 in)
193987.3 mm (3.4 in)
1940111.1 mm (4.4 in)
1941161.0 mm (6.3 in)
1942169.7 mm (6.7 in)
1943111.5 mm (4.4 in)
194457.9 mm (2.3 in)
194567.3 mm (2.6 in)
1946127.0 mm (5.0 in)
1947126.1 mm (5.0 in)
194861.6 mm (2.4 in)
194997.2 mm (3.8 in)
195057.5 mm (2.3 in)
195179.5 mm (3.1 in)
195289.4 mm (3.5 in)
195392.0 mm (3.6 in)
195490.5 mm (3.6 in)
1955108.2 mm (4.3 in)
195659.0 mm (2.3 in)
195756.4 mm (2.2 in)
195898.6 mm (3.9 in)
1959121.7 mm (4.8 in)
196099.4 mm (3.9 in)
196198.0 mm (3.9 in)
1962134.6 mm (5.3 in)
196357.9 mm (2.3 in)
196465.9 mm (2.6 in)
196563.5 mm (2.5 in)
196667.4 mm (2.7 in)
196796.3 mm (3.8 in)
196896.2 mm (3.8 in)
196987.2 mm (3.4 in)
197089.4 mm (3.5 in)
197174.4 mm (2.9 in)
1972121.6 mm (4.8 in)
197386.3 mm (3.4 in)
197469.1 mm (2.7 in)
197579.2 mm (3.1 in)
197678.2 mm (3.1 in)
197760.6 mm (2.4 in)
197893.1 mm (3.7 in)
1979106.4 mm (4.2 in)
198078.7 mm (3.1 in)
198170.6 mm (2.8 in)
198275.4 mm (3.0 in)
198397.5 mm (3.8 in)
198467.3 mm (2.6 in)
1985107.3 mm (4.2 in)
198693.4 mm (3.7 in)
198741.9 mm (1.6 in)
198864.2 mm (2.5 in)
198938.5 mm (1.5 in)
1990106.7 mm (4.2 in)
199177.0 mm (3.0 in)
199267.5 mm (2.7 in)
1993117.6 mm (4.6 in)
1994109.2 mm (4.3 in)
1995127.7 mm (5.0 in)
199682.6 mm (3.3 in)
199763.0 mm (2.5 in)
1998105.7 mm (4.2 in)
199994.0 mm (3.7 in)
200071.7 mm (2.8 in)
200187.6 mm (3.4 in)
200277.7 mm (3.1 in)
200375.7 mm (3.0 in)
200493.7 mm (3.7 in)
200549.1 mm (1.9 in)
2006116.2 mm (4.6 in)
200758.3 mm (2.3 in)
200845.1 mm (1.8 in)
200981.8 mm (3.2 in)
2010116.6 mm (4.6 in)
2011141.7 mm (5.6 in)
2012120.4 mm (4.7 in)
201379.5 mm (3.1 in)
201473.7 mm (2.9 in)
2015102.1 mm (4.0 in)
201673.9 mm (2.9 in)
201779.2 mm (3.1 in)
2018125.7 mm (4.9 in)
201969.6 mm (2.7 in)
202068.0 mm (2.7 in)
2021105.3 mm (4.1 in)
202284.3 mm (3.3 in)
202363.8 mm (2.5 in)
202467.6 mm (2.7 in)
202585.5 mm (3.4 in)
202667.3 mm (2.6 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Merrill by year The longest dry spell of the year at Merrill, 1905 to 2026. The record is 46 days in 1943, marked on the chart; the median year is 21 days. 1020304050192019401960198020002020Record: 46 days in 1943
The longest dry spell of the year at Merrill, 1905 to 2026. The record is 46 days in 1943, marked on the chart; the median year is 21 days.
Longest dry spell (CDD) at Merrill by year
YearLongest dry spell (CDD)
190522 days
190617 days
190723 days
190825 days
190926 days
191033 days
191128 days
191235 days
191324 days
191420 days
191522 days
191617 days
191723 days
191823 days
191915 days
192019 days
192119 days
192213 days
192326 days
192419 days
192534 days
192616 days
192726 days
192825 days
192922 days
193028 days
193119 days
193218 days
193319 days
193440 days
193514 days
193625 days
193723 days
193817 days
193920 days
194018 days
194124 days
194220 days
194346 days
194426 days
194517 days
194621 days
194723 days
194816 days
194922 days
195020 days
195111 days
195233 days
195344 days
195425 days
195518 days
195619 days
195719 days
195831 days
195916 days
196036 days
196130 days
196212 days
196318 days
196415 days
196518 days
196626 days
196727 days
196831 days
196925 days
197024 days
197130 days
197218 days
197325 days
197432 days
197519 days
197631 days
197728 days
197827 days
197915 days
198031 days
198125 days
198219 days
198319 days
198421 days
198516 days
198620 days
198729 days
198816 days
198926 days
199016 days
199116 days
199224 days
199323 days
199421 days
199518 days
199616 days
199724 days
199828 days
199922 days
200020 days
200115 days
200237 days
200325 days
200418 days
200516 days
200622 days
200724 days
200814 days
200922 days
201027 days
201119 days
201217 days
201314 days
201413 days
201520 days
201619 days
201713 days
201820 days
201929 days
202031 days
202115 days
202217 days
202314 days
202420 days
202532 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

97 years with a frost

Across 97 years with a frost, the median last spring frost at Merrill falls on 21 May and the median first autumn frost on 24 September, which leaves a median of 125 days between them.

In 1995 to 2025 the median growing season was 138 days. That is 13 days more than in 1906 to 1945.

Fitted over all years, the growing season changes by +1.4 days per decade at this station.

Frost dates and growing season at Merrill
MeasureMedian, all yearsEarliest period (1906 to 1945)Recent period (1995 to 2025)Recent against earliestFitted trend
Last spring frost21 May18 May17 May1 day earlier-0.5 days per decade
First autumn frost24 September24 September1 October7 days later+0.9 days per decade
Growing days125 days125 days138 days13 days more+1.4 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

115 years, 1906 to 2025

A day with at least 52.2 mm (2.1 in) of rain is expected about once in 2 years. A day with at least 125.7 mm (4.9 in) of rain is expected about once in 100 years.

Rainfall return levels at Merrill: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years52.2 mm (2.1 in)
5 years70.0 mm (2.8 in)
10 years82.5 mm (3.2 in)
25 years99.2 mm (3.9 in)
50 years112.2 mm (4.4 in)
100 years125.7 mm (4.9 in)

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 115 years of values from 1906 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: 149.9 mm (5.9 in) in 1912; 117.9 mm (4.6 in) in 2018; 110.5 mm (4.4 in) in 1946.

Station Changes

No change in the annual mean temperature of this station was found against its neighbours.

Climate Twins

2011 to 2025 against 1961 to 1990

Over 2011 to 2025, Merrill had a mean temperature of 6.0 C (42.8 F) and 908.3 mm (35.8 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Rigaud (Canada, 1,194 km away), Montreal/Pierre Elliott Trudea (Canada, 1,242 km away) and Ormstown (Canada, 1,222 km away).

Climate twins of Merrill: 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
RigaudCanada1,194 km (742 mi)6.0 C (42.8 F)896.6 mm (35.3 in)0.70
Montreal/Pierre Elliott TrudeaCanada1,242 km (772 mi)5.9 C (42.7 F)942.1 mm (37.1 in)0.75
OrmstownCanada1,222 km (759 mi)6.2 C (43.2 F)928.4 mm (36.6 in)0.77

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 Merrill standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Merrill 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2026-10-12).