Built 2026-10-18 (18 October 2026)

Olney 2S Weather Records (USC00116446)

Record envelope, standing records and threshold days for Olney 2S (USC00116446), Illinois, United States, with 134 years of record.

Key Facts for Olney 2S

  • Olney 2S (USC00116446) is a weather station in Illinois, United States at 38.70 latitude and -88.08 longitude, 140 m (459 ft) above sea level.
  • The station reports from 1893 to 2026, 134 years of record.
  • 1,464 records set at Olney 2S still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Olney 2S tied a daily record low maximum temperature of 22.8 C (73.0 F) on 23 June 2026.

About the Station

  • Location: Illinois, United States, 38.70 latitude, -88.08 longitude.
  • Elevation: 140 m (459 ft).
  • Period of record: 1893 to 2026, 134 years.
  • Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

5 days at or beyond a record
Daily record high and record low at Olney 2S, with 2026 drawn through them The band shows the record high and record low for each calendar day at Olney 2S. The lines show the 2026 daily maximum and minimum. 5 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -40-200204060 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Olney 2S. The lines show the 2026 daily maximum and minimum. 5 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Olney 2S, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan23.9 C (75.0 F)-31.1 C (-24.0 F)19.4 C (66.9 F)-21.1 C (-6.0 F)
Feb25.6 C (78.1 F)-31.7 C (-25.1 F)22.8 C (73.0 F)-16.7 C (1.9 F)
Mar31.7 C (89.1 F)-26.1 C (-15.0 F)31.1 C (88.0 F)-8.3 C (17.1 F)
Apr32.8 C (91.0 F)-6.1 C (21.0 F)29.4 C (84.9 F)1.7 C (35.1 F)
May36.7 C (98.1 F)-1.7 C (28.9 F)30.0 C (86.0 F)3.9 C (39.0 F)
Jun41.1 C (106.0 F)2.2 C (36.0 F)32.8 C (91.0 F)12.8 C (55.0 F)
Jul44.4 C (111.9 F)7.2 C (45.0 F)33.3 C (91.9 F)21.1 C (70.0 F)
Aug42.8 C (109.0 F)5.0 C (41.0 F)n/an/a
Sep41.1 C (106.0 F)-2.8 C (27.0 F)n/an/a
Oct36.1 C (97.0 F)-8.3 C (17.1 F)n/an/a
Nov28.3 C (82.9 F)-18.9 C (-2.0 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 Olney 2S by the year they were set 1,464 records at Olney 2S still stand. 1936 holds the most, with 42. 02040601896: 31897: 141898: 71899: 221900: 151901: 201902: 211903: 81904: 31905: 61906: 111907: 181908: 111909: 171910: 151911: 231912: 71913: 301914: 231915: 171916: 131917: 351918: 221919: 91920: 131921: 71922: 61923: 101924: 121925: 261926: 91927: 171928: 211929: 121930: 291931: 121932: 81933: 131934: 151935: 101936: 421937: 121938: 41939: 211940: 141941: 71942: 131943: 221944: 111945: 91946: 111947: 71948: 81949: 61950: 211951: 111952: 171953: 191954: 151955: 101956: 41957: 71958: 81959: 71960: 91961: 61962: 111963: 151964: 101965: 81966: 71967: 61968: 91969: 41970: 131971: 41972: 121973: 31974: 141975: 71976: 81977: 131978: 61979: 131980: 61981: 91982: 91983: 141984: 91985: 91986: 121987: 71988: 91989: 211990: 121991: 151992: 61993: 81994: 71995: 41996: 101997: 81998: 161999: 42000: 102001: 72002: 122003: 22004: 82005: 32006: 42007: 42008: 52009: 82010: 42011: 52012: 162013: 32014: 172015: 172016: 42017: 42018: 92019: 92020: 42021: 72022: 72023: 32024: 82025: 52026: 101896191019241938195219661980199420082022
1,464 records at Olney 2S still stand. 1936 holds the most, with 42.
Standing records at Olney 2S by the year they were set
Year setStanding records
18963
189714
18987
189922
190015
190120
190221
19038
19043
19056
190611
190718
190811
190917
191015
191123
19127
191330
191423
191517
191613
191735
191822
19199
192013
19217
19226
192310
192412
192526
19269
192717
192821
192912
193029
193112
19328
193313
193415
193510
193642
193712
19384
193921
194014
19417
194213
194322
194411
19459
194611
19477
19488
19496
195021
195111
195217
195319
195415
195510
19564
19577
19588
19597
19609
19616
196211
196315
196410
19658
19667
19676
19689
19694
197013
19714
197212
19733
197414
19757
19768
197713
19786
197913
19806
19819
19829
198314
19849
19859
198612
19877
19889
198921
199012
199115
19926
19938
19947
19954
199610
19978
199816
19994
200010
20017
200212
20032
20048
20053
20064
20074
20085
20098
20104
20115
201216
20133
201417
201517
20164
20174
20189
20199
20204
20217
20227
20233
20248
20255
202610

All-Time Record Progression

8 new records
When Olney 2S set new all-time records 8 all-time records were set at Olney 2S between 3 September 1926 and 7 January 2014. Each dot is a new record. Record daily precipitationRecord high maximum temperatureRecord low minimum temperatureRecord high minimum temperatureRecord low maximum temperature3 September 1926: Record daily precipitation 163.3 mm (6.4 in)27 July 1930: Record high maximum temperature 43.3 C (109.9 F)28 July 1930: Record high maximum temperature 43.9 C (111.0 F)14 July 1936: Record high maximum temperature 44.4 C (111.9 F)2 February 1951: Record low minimum temperature -31.7 C (-25.1 F)29 June 1952: Record high minimum temperature 28.3 C (82.9 F)22 December 1989: Record low maximum temperature -19.4 C (-2.9 F)7 January 2014: Record low maximum temperature -20.0 C (-4.0 F)193519501965198019952010
8 all-time records were set at Olney 2S between 3 September 1926 and 7 January 2014. Each dot is a new record.
When Olney 2S set new all-time records
DateKindDetail
1926-09-03Record daily precipitationRecord daily precipitation 163.3 mm (6.4 in)
1930-07-27Record high maximum temperatureRecord high maximum temperature 43.3 C (109.9 F)
1930-07-28Record high maximum temperatureRecord high maximum temperature 43.9 C (111.0 F)
1936-07-14Record high maximum temperatureRecord high maximum temperature 44.4 C (111.9 F)
1951-02-02Record low minimum temperatureRecord low minimum temperature -31.7 C (-25.1 F)
1952-06-29Record high minimum temperatureRecord high minimum temperature 28.3 C (82.9 F)
1989-12-22Record low maximum temperatureRecord low maximum temperature -19.4 C (-2.9 F)
2014-01-07Record low maximum temperatureRecord low maximum temperature -20.0 C (-4.0 F)

Wettest Day of Each Month

Sep: 163.3 mm (6.4 in)
Record daily precipitation for each month at Olney 2S The wettest day on record for each calendar month at Olney 2S. The most was 163.3 mm (6.4 in) on 3 September 1926. 050100150200 Jan: 80.5 mm (3.2 in), 1 January 1948 Jan Feb: 64.5 mm (2.5 in), 9 February 1965 Feb Mar: 160.0 mm (6.3 in), 25 March 1904 Mar Apr: 95.3 mm (3.8 in), 19 April 1959 Apr May: 136.4 mm (5.4 in), 7 May 1961 May Jun: 112.5 mm (4.4 in), 18 June 1911 Jun Jul: 115.6 mm (4.6 in), 10 July 1933 Jul Aug: 104.6 mm (4.1 in), 3 August 1924 Aug Sep: 163.3 mm (6.4 in), 3 September 1926 Sep Oct: 116.8 mm (4.6 in), 18 October 1905 Oct Nov: 135.6 mm (5.3 in), 14 November 1993 Nov Dec: 100.3 mm (3.9 in), 3 December 1982 Dec
The wettest day on record for each calendar month at Olney 2S. The most was 163.3 mm (6.4 in) on 3 September 1926.
Record daily precipitation for each month at Olney 2S
MonthRecord daily precipitation (mm)Date
Jan80.5 mm (3.2 in)1 January 1948
Feb64.5 mm (2.5 in)9 February 1965
Mar160.0 mm (6.3 in)25 March 1904
Apr95.3 mm (3.8 in)19 April 1959
May136.4 mm (5.4 in)7 May 1961
Jun112.5 mm (4.4 in)18 June 1911
Jul115.6 mm (4.6 in)10 July 1933
Aug104.6 mm (4.1 in)3 August 1924
Sep163.3 mm (6.4 in)3 September 1926
Oct116.8 mm (4.6 in)18 October 1905
Nov135.6 mm (5.3 in)14 November 1993
Dec100.3 mm (3.9 in)3 December 1982

Period of Record Coverage

1896 to 2026
Days with data per year at Olney 2S 131 years of record at Olney 2S, 1896 to 2026. 16 years have data for under 90 percent of days and are left out of rankings: 1896, 1912, 1920, 1949, 1954, 1955, 1956, 1957 and others. 1896: 57 of 366 days1897: 361 of 365 days1898: 365 of 365 days1899: 365 of 365 days1900: 364 of 365 days1901: 365 of 365 days1902: 365 of 365 days1903: 365 of 365 days1904: 366 of 366 days1905: 364 of 365 days1906: 365 of 365 days1907: 363 of 365 days1908: 365 of 366 days1909: 364 of 365 days1910: 363 of 365 days1911: 365 of 365 days1912: 271 of 366 days1913: 362 of 365 days1914: 334 of 365 days1915: 365 of 365 days1916: 366 of 366 days1917: 364 of 365 days1918: 364 of 365 days1919: 364 of 365 days1920: 321 of 366 days1921: 365 of 365 days1922: 363 of 365 days1923: 364 of 365 days1924: 352 of 366 days1925: 364 of 365 days1926: 365 of 365 days1927: 365 of 365 days1928: 366 of 366 days1929: 334 of 365 days1930: 365 of 365 days1931: 364 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: 363 of 365 days1940: 366 of 366 days1941: 364 of 365 days1942: 365 of 365 days1943: 365 of 365 days1944: 365 of 366 days1945: 365 of 365 days1946: 365 of 365 days1947: 365 of 365 days1948: 365 of 366 days1949: 289 of 365 days1950: 361 of 365 days1951: 361 of 365 days1952: 363 of 366 days1953: 363 of 365 days1954: 240 of 365 days1955: 264 of 365 days1956: 231 of 366 days1957: 320 of 365 days1958: 364 of 365 days1959: 365 of 365 days1960: 362 of 366 days1961: 365 of 365 days1962: 361 of 365 days1963: 360 of 365 days1964: 361 of 366 days1965: 331 of 365 days1966: 362 of 365 days1967: 364 of 365 days1968: 364 of 366 days1969: 364 of 365 days1970: 365 of 365 days1971: 365 of 365 days1972: 364 of 366 days1973: 364 of 365 days1974: 363 of 365 days1975: 365 of 365 days1976: 366 of 366 days1977: 363 of 365 days1978: 353 of 365 days1979: 361 of 365 days1980: 364 of 366 days1981: 364 of 365 days1982: 302 of 365 days1983: 302 of 365 days1984: 311 of 366 days1985: 301 of 365 days1986: 236 of 365 days1987: 289 of 365 days1988: 361 of 366 days1989: 363 of 365 days1990: 273 of 365 days1991: 365 of 365 days1992: 364 of 366 days1993: 331 of 365 days1994: 360 of 365 days1995: 362 of 365 days1996: 361 of 366 days1997: 362 of 365 days1998: 360 of 365 days1999: 361 of 365 days2000: 364 of 366 days2001: 365 of 365 days2002: 365 of 365 days2003: 336 of 365 days2004: 365 of 366 days2005: 365 of 365 days2006: 365 of 365 days2007: 365 of 365 days2008: 366 of 366 days2009: 365 of 365 days2010: 364 of 365 days2011: 365 of 365 days2012: 366 of 366 days2013: 364 of 365 days2014: 365 of 365 days2015: 334 of 365 days2016: 335 of 366 days2017: 334 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: 185 of 365 days1900192019401960198020002020
131 years of record at Olney 2S, 1896 to 2026. 16 years have data for under 90 percent of days and are left out of rankings: 1896, 1912, 1920, 1949, 1954, 1955, 1956, 1957 and others.
Days with data per year at Olney 2S
YearDays with dataShare of yearComplete
18965716%No
189736199%Yes
1898365100%Yes
1899365100%Yes
1900364100%Yes
1901365100%Yes
1902365100%Yes
1903365100%Yes
1904366100%Yes
1905364100%Yes
1906365100%Yes
190736399%Yes
1908365100%Yes
1909364100%Yes
191036399%Yes
1911365100%Yes
191227174%No
191336299%Yes
191433492%Yes
1915365100%Yes
1916366100%Yes
1917364100%Yes
1918364100%Yes
1919364100%Yes
192032188%No
1921365100%Yes
192236399%Yes
1923364100%Yes
192435296%Yes
1925364100%Yes
1926365100%Yes
1927365100%Yes
1928366100%Yes
192933492%Yes
1930365100%Yes
1931364100%Yes
1932366100%Yes
1933365100%Yes
1934365100%Yes
1935365100%Yes
1936366100%Yes
1937365100%Yes
1938365100%Yes
193936399%Yes
1940366100%Yes
1941364100%Yes
1942365100%Yes
1943365100%Yes
1944365100%Yes
1945365100%Yes
1946365100%Yes
1947365100%Yes
1948365100%Yes
194928979%No
195036199%Yes
195136199%Yes
195236399%Yes
195336399%Yes
195424066%No
195526472%No
195623163%No
195732088%No
1958364100%Yes
1959365100%Yes
196036299%Yes
1961365100%Yes
196236199%Yes
196336099%Yes
196436199%Yes
196533191%Yes
196636299%Yes
1967364100%Yes
196836499%Yes
1969364100%Yes
1970365100%Yes
1971365100%Yes
197236499%Yes
1973364100%Yes
197436399%Yes
1975365100%Yes
1976366100%Yes
197736399%Yes
197835397%Yes
197936199%Yes
198036499%Yes
1981364100%Yes
198230283%No
198330283%No
198431185%No
198530182%No
198623665%No
198728979%No
198836199%Yes
198936399%Yes
199027375%No
1991365100%Yes
199236499%Yes
199333191%Yes
199436099%Yes
199536299%Yes
199636199%Yes
199736299%Yes
199836099%Yes
199936199%Yes
200036499%Yes
2001365100%Yes
2002365100%Yes
200333692%Yes
2004365100%Yes
2005365100%Yes
2006365100%Yes
2007365100%Yes
2008366100%Yes
2009365100%Yes
2010364100%Yes
2011365100%Yes
2012366100%Yes
2013364100%Yes
2014365100%Yes
201533492%Yes
201633592%Yes
201733492%Yes
2018365100%Yes
2019365100%Yes
2020366100%Yes
2021365100%Yes
2022365100%Yes
2023365100%Yes
2024366100%Yes
2025365100%Yes
202618551%No

Latest Records

20
Latest records at Olney 2S
DateStationRecordValueBeat old record byOld record stoodSignificance
23 June 2026Olney 2S, USdaily low max (Tie)22.8 C (73.0 F)tie52 years6 of 100 (Routine)
28 April 2026Olney 2S, USdaily rain72.6 mm (2.9 in)23.8 mm (0.9 in)15 years33 of 100 (Routine)
15 April 2026Olney 2S, USmonthly high min (Tie)20.6 C (69.1 F)tie55 years9 of 100 (Routine)
14 April 2026Olney 2S, USmonthly high min (Tie)20.6 C (69.1 F)tie55 years9 of 100 (Routine)
4 April 2026Olney 2S, USdaily high min17.8 C (64.0 F)2.2 C (4.0 F)97 years43 of 100 (Notable)
2 April 2026Olney 2S, USdaily high min17.8 C (64.0 F)2.2 C (4.0 F)123 years44 of 100 (Notable)
1 April 2026Olney 2S, USdaily high min17.2 C (63.0 F)1.1 C (2.0 F)48 years26 of 100 (Routine)
23 March 2026Olney 2S, USdaily high max (Tie)31.1 C (88.0 F)tie116 years10 of 100 (Routine)
17 March 2026Olney 2S, USdaily low max-1.1 C (30.0 F)0.5 C (0.9 F)84 years35 of 100 (Notable)
11 March 2026Olney 2S, USdaily high max26.7 C (80.1 F)1.7 C (3.1 F)115 years42 of 100 (Notable)
11 March 2026Olney 2S, USdaily high min16.7 C (62.1 F)0.6 C (1.1 F)36 years20 of 100 (Routine)
19 February 2026Olney 2S, USdaily high max22.8 C (73.0 F)0.6 C (1.1 F)96 years38 of 100 (Notable)
19 February 2026Olney 2S, USdaily high min (Tie)11.7 C (53.1 F)tie32 years4 of 100 (Routine)
26 January 2026Olney 2S, USdaily low min (Tie)-21.1 C (-6.0 F)tie86 years8 of 100 (Routine)
25 January 2026Olney 2S, USdaily snowfall27.9 cm (11.0 in)7.6 cm (3.0 in)122 years58 of 100 (Notable)
16 January 2026Olney 2S, USdaily snowfall (Tie)1.3 cm (0.5 in)tie42 years5 of 100 (Routine)
9 January 2026Olney 2S, USdaily high max19.4 C (66.9 F)1.1 C (2.0 F)60 years29 of 100 (Routine)
9 January 2026Olney 2S, USdaily high min (Tie)7.8 C (46.0 F)tie91 years9 of 100 (Routine)
29 December 2025Olney 2S, USdaily high max20.6 C (69.1 F)1.7 C (3.1 F)40 years24 of 100 (Routine)
27 December 2025Olney 2S, USdaily high max21.1 C (70.0 F)1.1 C (2.0 F)83 years35 of 100 (Notable)

Climate Trend

109 complete years, 1897 to 2025
Annual mean temperature at Olney 2S as warming stripes, 1897 to 2025 One stripe for each of 109 complete years at Olney 2S, 1897 to 2025. Blue stripes are years cooler than the station's own mean of 12.9 C (55.2 F); red stripes are warmer. The coolest year was 1917, at 10.4 C (50.8 F), and the warmest was 1931, at 14.6 C (58.3 F). The strongest colour marks a difference of 2.5 C (4.5 F). 1897: 13.0 C, +0.1 C from the station mean1898: 13.2 C, +0.3 C from the station mean1899: 12.8 C, -0.1 C from the station mean1900: 13.7 C, +0.8 C from the station mean1901: 12.8 C, -0.1 C from the station mean1902: 13.0 C, +0.1 C from the station mean1903: 12.6 C, -0.3 C from the station mean1904: 11.8 C, -1.1 C from the station mean1905: 12.2 C, -0.7 C from the station mean1906: 13.0 C, +0.1 C from the station mean1907: 12.6 C, -0.3 C from the station mean1908: 14.1 C, +1.2 C from the station mean1909: 13.3 C, +0.4 C from the station mean1910: 12.8 C, -0.1 C from the station mean1911: 14.0 C, +1.1 C from the station mean1913: 13.0 C, +0.1 C from the station mean1915: 11.9 C, -1.0 C from the station mean1916: 11.8 C, -1.1 C from the station mean1917: 10.4 C, -2.5 C from the station mean1918: 11.9 C, -1.0 C from the station mean1919: 13.1 C, +0.2 C from the station mean1922: 14.1 C, +1.3 C from the station mean1923: 13.4 C, +0.5 C from the station mean1925: 13.8 C, +0.9 C from the station mean1926: 13.0 C, +0.1 C from the station mean1927: 13.6 C, +0.7 C from the station mean1928: 12.9 C, 0.0 C from the station mean1930: 13.7 C, +0.8 C from the station mean1931: 14.6 C, +1.7 C from the station mean1932: 13.5 C, +0.6 C from the station mean1933: 14.1 C, +1.2 C from the station mean1934: 13.3 C, +0.4 C from the station mean1935: 12.9 C, 0.0 C from the station mean1936: 13.4 C, +0.6 C from the station mean1937: 12.4 C, -0.5 C from the station mean1938: 14.3 C, +1.4 C from the station mean1939: 13.8 C, +0.9 C from the station mean1940: 12.6 C, -0.2 C from the station mean1941: 14.0 C, +1.1 C from the station mean1942: 13.4 C, +0.6 C from the station mean1943: 13.3 C, +0.4 C from the station mean1944: 13.8 C, +0.9 C from the station mean1945: 12.8 C, -0.1 C from the station mean1946: 14.4 C, +1.5 C from the station mean1947: 12.9 C, 0.0 C from the station mean1948: 13.1 C, +0.2 C from the station mean1950: 12.4 C, -0.4 C from the station mean1951: 12.4 C, -0.4 C from the station mean1952: 13.8 C, +0.9 C from the station mean1953: 14.3 C, +1.5 C from the station mean1958: 12.2 C, -0.7 C from the station mean1959: 13.7 C, +0.8 C from the station mean1960: 12.7 C, -0.2 C from the station mean1961: 13.0 C, +0.1 C from the station mean1962: 12.7 C, -0.2 C from the station mean1963: 11.8 C, -1.1 C from the station mean1964: 13.3 C, +0.4 C from the station mean1966: 12.3 C, -0.5 C from the station mean1967: 12.5 C, -0.4 C from the station mean1968: 12.3 C, -0.6 C from the station mean1969: 12.1 C, -0.8 C from the station mean1970: 12.7 C, -0.2 C from the station mean1971: 13.0 C, +0.1 C from the station mean1972: 12.4 C, -0.4 C from the station mean1973: 13.7 C, +0.8 C from the station mean1974: 13.1 C, +0.2 C from the station mean1975: 13.2 C, +0.3 C from the station mean1976: 12.0 C, -0.9 C from the station mean1977: 12.5 C, -0.4 C from the station mean1978: 11.7 C, -1.2 C from the station mean1979: 11.5 C, -1.3 C from the station mean1980: 12.5 C, -0.4 C from the station mean1981: 12.7 C, -0.2 C from the station mean1982: 12.1 C, -0.8 C from the station mean1983: 12.6 C, -0.3 C from the station mean1984: 12.7 C, -0.2 C from the station mean1985: 12.3 C, -0.6 C from the station mean1988: 12.4 C, -0.4 C from the station mean1989: 12.1 C, -0.8 C from the station mean1991: 14.1 C, +1.2 C from the station mean1992: 13.1 C, +0.2 C from the station mean1994: 12.9 C, +0.1 C from the station mean1995: 12.8 C, -0.1 C from the station mean1996: 12.2 C, -0.7 C from the station mean1997: 12.3 C, -0.5 C from the station mean1998: 14.1 C, +1.2 C from the station mean1999: 13.1 C, +0.2 C from the station mean2000: 12.4 C, -0.5 C from the station mean2001: 12.9 C, 0.0 C from the station mean2002: 13.0 C, +0.1 C from the station mean2004: 12.6 C, -0.3 C from the station mean2005: 13.0 C, +0.1 C from the station mean2006: 13.2 C, +0.3 C from the station mean2007: 13.1 C, +0.2 C from the station mean2008: 11.6 C, -1.2 C from the station mean2009: 12.0 C, -0.9 C from the station mean2010: 12.5 C, -0.4 C from the station mean2011: 13.0 C, +0.2 C from the station mean2012: 14.3 C, +1.4 C from the station mean2013: 11.5 C, -1.4 C from the station mean2014: 10.7 C, -2.2 C from the station mean2018: 12.6 C, -0.3 C from the station mean2019: 12.4 C, -0.4 C from the station mean2020: 12.7 C, -0.2 C from the station mean2021: 13.1 C, +0.2 C from the station mean2022: 12.3 C, -0.6 C from the station mean2023: 13.5 C, +0.6 C from the station mean2024: 13.8 C, +1.0 C from the station mean2025: 13.1 C, +0.2 C from the station mean1897191019201930194019501960197019801990200020102020
One stripe for each of 109 complete years at Olney 2S, 1897 to 2025. Blue stripes are years cooler than the station's own mean of 12.9 C (55.2 F); red stripes are warmer. The coolest year was 1917, at 10.4 C (50.8 F), and the warmest was 1931, at 14.6 C (58.3 F). The strongest colour marks a difference of 2.5 C (4.5 F).
Annual mean temperature at Olney 2S as warming stripes, 1897 to 2025
YearAnnual mean temperatureDifference from the station mean
189713.0 C+0.10 C
189813.2 C+0.30 C
189912.8 C-0.09 C
190013.7 C+0.77 C
190112.8 C-0.13 C
190213.0 C+0.08 C
190312.6 C-0.33 C
190411.8 C-1.12 C
190512.2 C-0.66 C
190613.0 C+0.12 C
190712.6 C-0.32 C
190814.1 C+1.19 C
190913.3 C+0.38 C
191012.8 C-0.06 C
191114.0 C+1.09 C
191313.0 C+0.08 C
191511.9 C-0.98 C
191611.8 C-1.12 C
191710.4 C-2.46 C
191811.9 C-1.00 C
191913.1 C+0.19 C
192214.1 C+1.25 C
192313.4 C+0.48 C
192513.8 C+0.89 C
192613.0 C+0.09 C
192713.6 C+0.67 C
192812.9 C+0.01 C
193013.7 C+0.80 C
193114.6 C+1.73 C
193213.5 C+0.58 C
193314.1 C+1.23 C
193413.3 C+0.41 C
193512.9 C+0.03 C
193613.4 C+0.55 C
193712.4 C-0.49 C
193814.3 C+1.42 C
193913.8 C+0.93 C
194012.6 C-0.24 C
194114.0 C+1.08 C
194213.4 C+0.55 C
194313.3 C+0.37 C
194413.8 C+0.88 C
194512.8 C-0.09 C
194614.4 C+1.54 C
194712.9 C-0.03 C
194813.1 C+0.21 C
195012.4 C-0.45 C
195112.4 C-0.45 C
195213.8 C+0.91 C
195314.3 C+1.46 C
195812.2 C-0.72 C
195913.7 C+0.77 C
196012.7 C-0.22 C
196113.0 C+0.14 C
196212.7 C-0.19 C
196311.8 C-1.08 C
196413.3 C+0.39 C
196612.3 C-0.54 C
196712.5 C-0.38 C
196812.3 C-0.60 C
196912.1 C-0.79 C
197012.7 C-0.23 C
197113.0 C+0.10 C
197212.4 C-0.45 C
197313.7 C+0.79 C
197413.1 C+0.17 C
197513.2 C+0.29 C
197612.0 C-0.90 C
197712.5 C-0.36 C
197811.7 C-1.21 C
197911.5 C-1.35 C
198012.5 C-0.43 C
198112.7 C-0.19 C
198212.1 C-0.80 C
198312.6 C-0.32 C
198412.7 C-0.23 C
198512.3 C-0.63 C
198812.4 C-0.45 C
198912.1 C-0.79 C
199114.1 C+1.23 C
199213.1 C+0.20 C
199412.9 C+0.06 C
199512.8 C-0.07 C
199612.2 C-0.67 C
199712.3 C-0.55 C
199814.1 C+1.18 C
199913.1 C+0.19 C
200012.4 C-0.48 C
200112.9 C+0.03 C
200213.0 C+0.07 C
200412.6 C-0.29 C
200513.0 C+0.13 C
200613.2 C+0.32 C
200713.1 C+0.24 C
200811.6 C-1.25 C
200912.0 C-0.89 C
201012.5 C-0.38 C
201113.0 C+0.15 C
201214.3 C+1.42 C
201311.5 C-1.36 C
201410.7 C-2.19 C
201812.6 C-0.30 C
201912.4 C-0.44 C
202012.7 C-0.20 C
202113.1 C+0.18 C
202212.3 C-0.56 C
202313.5 C+0.59 C
202413.8 C+0.95 C
202513.1 C+0.18 C

The fitted trend in annual mean temperature here over 1897 to 2025 is -0.04 C (-0.07 to 0.00) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.06 F (-0.13 to 0.01) per decade. The slope is a straight line fitted to 109 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Olney 2S
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature-0.04 C (-0.07 to 0.00) per decade-0.06 F (-0.13 to 0.01) per decade1897 to 2025109Not clearly different from zero
Mean daily maximum-0.06 C (-0.10 to -0.01) per decade-0.11 F (-0.19 to -0.03) per decade1897 to 2025109Fall
Mean daily minimum-0.01 C (-0.05 to 0.03) per decade-0.02 F (-0.09 to 0.05) per decade1897 to 2025109Not 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

1893 to 2026
Yearly extremes at Olney 2S: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)44.4 C (111.9 F)193636.7 C (98.1 F)131
Coldest night (TNn)-31.7 C (-25.1 F)1951-20.6 C (-5.1 F)131
Wettest day (Rx1day)163.3 mm (6.4 in)192667.4 mm (2.7 in)134
Wettest five days (Rx5day)289.9 mm (11.4 in)1961105.1 mm (4.1 in)134
Longest dry spell (CDD)42 days195519 days134

Hottest day (TXx)

Hottest day (TXx) at Olney 2S by year The hottest day of the year at Olney 2S, 1893 to 2026. The record is 44.4 C (111.9 F) in 1936, marked on the chart; the median year is 36.7 C (98.1 F). 203040501900192019401960198020002020Record: 44.4 C (111.9 F) in 1936
The hottest day of the year at Olney 2S, 1893 to 2026. The record is 44.4 C (111.9 F) in 1936, marked on the chart; the median year is 36.7 C (98.1 F).
Hottest day (TXx) at Olney 2S by year
YearHottest day (TXx)
1893n/a
1894n/a
1895n/a
189623.9 C (75.0 F)
189738.9 C (102.0 F)
189836.7 C (98.1 F)
189938.3 C (100.9 F)
190037.8 C (100.0 F)
190142.8 C (109.0 F)
190237.8 C (100.0 F)
190338.9 C (102.0 F)
190434.4 C (93.9 F)
190537.2 C (99.0 F)
190635.6 C (96.1 F)
190736.7 C (98.1 F)
190839.4 C (102.9 F)
190938.3 C (100.9 F)
191036.1 C (97.0 F)
191138.3 C (100.9 F)
191235.6 C (96.1 F)
191341.1 C (106.0 F)
191439.4 C (102.9 F)
191534.4 C (93.9 F)
191638.3 C (100.9 F)
191737.2 C (99.0 F)
191841.1 C (106.0 F)
191937.8 C (100.0 F)
192035.0 C (95.0 F)
192137.8 C (100.0 F)
192237.2 C (99.0 F)
192336.7 C (98.1 F)
192436.1 C (97.0 F)
192541.1 C (106.0 F)
192640.0 C (104.0 F)
192737.8 C (100.0 F)
192836.7 C (98.1 F)
192937.2 C (99.0 F)
193043.9 C (111.0 F)
193141.7 C (107.1 F)
193238.3 C (100.9 F)
193338.9 C (102.0 F)
193439.4 C (102.9 F)
193539.4 C (102.9 F)
193644.4 C (111.9 F)
193737.2 C (99.0 F)
193837.8 C (100.0 F)
193940.6 C (105.1 F)
194040.0 C (104.0 F)
194140.0 C (104.0 F)
194237.2 C (99.0 F)
194342.8 C (109.0 F)
194441.1 C (106.0 F)
194537.2 C (99.0 F)
194640.0 C (104.0 F)
194741.7 C (107.1 F)
194836.7 C (98.1 F)
194936.7 C (98.1 F)
195035.0 C (95.0 F)
195136.7 C (98.1 F)
195239.4 C (102.9 F)
195341.1 C (106.0 F)
195443.3 C (109.9 F)
195537.2 C (99.0 F)
195637.8 C (100.0 F)
195735.6 C (96.1 F)
195835.6 C (96.1 F)
195936.1 C (97.0 F)
196038.3 C (100.9 F)
196135.0 C (95.0 F)
196238.9 C (102.0 F)
196336.1 C (97.0 F)
196437.8 C (100.0 F)
196537.8 C (100.0 F)
196640.0 C (104.0 F)
196733.9 C (93.0 F)
196836.1 C (97.0 F)
196935.0 C (95.0 F)
197037.2 C (99.0 F)
197136.1 C (97.0 F)
197236.1 C (97.0 F)
197334.4 C (93.9 F)
197436.1 C (97.0 F)
197535.6 C (96.1 F)
197635.6 C (96.1 F)
197736.1 C (97.0 F)
197837.8 C (100.0 F)
197934.4 C (93.9 F)
198037.2 C (99.0 F)
198136.1 C (97.0 F)
198236.7 C (98.1 F)
198338.3 C (100.9 F)
198437.2 C (99.0 F)
198534.4 C (93.9 F)
198635.6 C (96.1 F)
198736.7 C (98.1 F)
198839.4 C (102.9 F)
198935.0 C (95.0 F)
199036.7 C (98.1 F)
199137.8 C (100.0 F)
199235.0 C (95.0 F)
199336.1 C (97.0 F)
199436.1 C (97.0 F)
199537.2 C (99.0 F)
199635.0 C (95.0 F)
199735.6 C (96.1 F)
199836.1 C (97.0 F)
199936.7 C (98.1 F)
200035.0 C (95.0 F)
200135.0 C (95.0 F)
200237.2 C (99.0 F)
200335.6 C (96.1 F)
200435.0 C (95.0 F)
200536.7 C (98.1 F)
200636.1 C (97.0 F)
200738.3 C (100.9 F)
200835.6 C (96.1 F)
200935.6 C (96.1 F)
201036.7 C (98.1 F)
201138.3 C (100.9 F)
201240.6 C (105.1 F)
201336.1 C (97.0 F)
201434.4 C (93.9 F)
201535.0 C (95.0 F)
201635.0 C (95.0 F)
201735.6 C (96.1 F)
201834.4 C (93.9 F)
201935.0 C (95.0 F)
202034.4 C (93.9 F)
202135.6 C (96.1 F)
202236.1 C (97.0 F)
202336.7 C (98.1 F)
202435.6 C (96.1 F)
202535.6 C (96.1 F)
202633.3 C (91.9 F)

Coldest night (TNn)

Coldest night (TNn) at Olney 2S by year The coldest night of the year at Olney 2S, 1893 to 2026. The record is -31.7 C (-25.1 F) in 1951, marked on the chart; the median year is -20.6 C (-5.1 F). -40-30-20-101900192019401960198020002020Record: -31.7 C (-25.1 F) in 1951
The coldest night of the year at Olney 2S, 1893 to 2026. The record is -31.7 C (-25.1 F) in 1951, marked on the chart; the median year is -20.6 C (-5.1 F).
Coldest night (TNn) at Olney 2S by year
YearColdest night (TNn)
1893n/a
1894n/a
1895n/a
1896-12.2 C (10.0 F)
1897-20.6 C (-5.1 F)
1898-20.0 C (-4.0 F)
1899-28.9 C (-20.0 F)
1900-20.0 C (-4.0 F)
1901-22.2 C (-8.0 F)
1902-18.9 C (-2.0 F)
1903-21.7 C (-7.1 F)
1904-27.2 C (-17.0 F)
1905-27.2 C (-17.0 F)
1906-21.1 C (-6.0 F)
1907-16.1 C (3.0 F)
1908-15.0 C (5.0 F)
1909-21.1 C (-6.0 F)
1910-25.0 C (-13.0 F)
1911-17.2 C (1.0 F)
1912-29.4 C (-20.9 F)
1913-19.4 C (-2.9 F)
1914-22.8 C (-9.0 F)
1915-27.8 C (-18.0 F)
1916-21.7 C (-7.1 F)
1917-23.3 C (-9.9 F)
1918-27.8 C (-18.0 F)
1919-18.3 C (-0.9 F)
1920-20.6 C (-5.1 F)
1921-10.6 C (12.9 F)
1922-17.8 C (0.0 F)
1923-15.6 C (3.9 F)
1924-26.1 C (-15.0 F)
1925-18.9 C (-2.0 F)
1926-20.0 C (-4.0 F)
1927-21.7 C (-7.1 F)
1928-21.1 C (-6.0 F)
1929-21.1 C (-6.0 F)
1930-27.8 C (-18.0 F)
1931-13.3 C (8.1 F)
1932-20.0 C (-4.0 F)
1933-18.9 C (-2.0 F)
1934-26.1 C (-15.0 F)
1935-21.1 C (-6.0 F)
1936-26.1 C (-15.0 F)
1937-17.2 C (1.0 F)
1938-17.2 C (1.0 F)
1939-18.9 C (-2.0 F)
1940-25.0 C (-13.0 F)
1941-12.8 C (9.0 F)
1942-23.3 C (-9.9 F)
1943-21.1 C (-6.0 F)
1944-17.2 C (1.0 F)
1945-20.0 C (-4.0 F)
1946-20.6 C (-5.1 F)
1947-16.1 C (3.0 F)
1948-20.6 C (-5.1 F)
1949-17.2 C (1.0 F)
1950-17.8 C (0.0 F)
1951-31.7 C (-25.1 F)
1952-14.4 C (6.1 F)
1953-16.7 C (1.9 F)
1954-16.7 C (1.9 F)
1955-18.9 C (-2.0 F)
1956-15.0 C (5.0 F)
1957-20.0 C (-4.0 F)
1958-21.1 C (-6.0 F)
1959-21.1 C (-6.0 F)
1960-20.6 C (-5.1 F)
1961-21.1 C (-6.0 F)
1962-22.2 C (-8.0 F)
1963-28.3 C (-18.9 F)
1964-22.2 C (-8.0 F)
1965-24.4 C (-11.9 F)
1966-25.6 C (-14.1 F)
1967-18.9 C (-2.0 F)
1968-23.3 C (-9.9 F)
1969-17.8 C (0.0 F)
1970-24.4 C (-11.9 F)
1971-23.3 C (-9.9 F)
1972-25.6 C (-14.1 F)
1973-23.9 C (-11.0 F)
1974-19.4 C (-2.9 F)
1975-15.6 C (3.9 F)
1976-20.6 C (-5.1 F)
1977-30.6 C (-23.1 F)
1978-26.1 C (-15.0 F)
1979-25.0 C (-13.0 F)
1980-22.2 C (-8.0 F)
1981-21.7 C (-7.1 F)
1982-29.4 C (-20.9 F)
1983-23.9 C (-11.0 F)
1984-28.3 C (-18.9 F)
1985-28.3 C (-18.9 F)
1986-22.8 C (-9.0 F)
1987-10.6 C (12.9 F)
1988-20.0 C (-4.0 F)
1989-28.3 C (-18.9 F)
1990-17.8 C (0.0 F)
1991-15.0 C (5.0 F)
1992-16.7 C (1.9 F)
1993-21.7 C (-7.1 F)
1994-31.1 C (-24.0 F)
1995-19.4 C (-2.9 F)
1996-24.4 C (-11.9 F)
1997-22.2 C (-8.0 F)
1998-13.3 C (8.1 F)
1999-22.2 C (-8.0 F)
2000-20.0 C (-4.0 F)
2001-17.8 C (0.0 F)
2002-16.7 C (1.9 F)
2003-19.4 C (-2.9 F)
2004-24.4 C (-11.9 F)
2005-17.2 C (1.0 F)
2006-13.9 C (7.0 F)
2007-17.2 C (1.0 F)
2008-17.8 C (0.0 F)
2009-19.4 C (-2.9 F)
2010-18.9 C (-2.0 F)
2011-18.9 C (-2.0 F)
2012-12.8 C (9.0 F)
2013-18.9 C (-2.0 F)
2014-23.3 C (-9.9 F)
2015-24.4 C (-11.9 F)
2016-15.6 C (3.9 F)
2017-18.9 C (-2.0 F)
2018-20.6 C (-5.1 F)
2019-20.6 C (-5.1 F)
2020-14.4 C (6.1 F)
2021-20.6 C (-5.1 F)
2022-22.2 C (-8.0 F)
2023-10.6 C (12.9 F)
2024-19.4 C (-2.9 F)
2025-18.9 C (-2.0 F)
2026-21.1 C (-6.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Olney 2S by year The wettest day of the year at Olney 2S, 1893 to 2026. The record is 163.3 mm (6.4 in) in 1926, marked on the chart; the median year is 67.4 mm (2.7 in). 0501001502001900192019401960198020002020Record: 163.3 mm (6.4 in) in 1926
The wettest day of the year at Olney 2S, 1893 to 2026. The record is 163.3 mm (6.4 in) in 1926, marked on the chart; the median year is 67.4 mm (2.7 in).
Wettest day (Rx1day) at Olney 2S by year
YearWettest day (Rx1day)
189357.7 mm (2.3 in)
189441.9 mm (1.6 in)
189583.3 mm (3.3 in)
1896107.7 mm (4.2 in)
189781.8 mm (3.2 in)
189852.8 mm (2.1 in)
189942.7 mm (1.7 in)
190045.2 mm (1.8 in)
190176.7 mm (3.0 in)
190249.0 mm (1.9 in)
190354.4 mm (2.1 in)
1904160.0 mm (6.3 in)
1905116.8 mm (4.6 in)
190665.0 mm (2.6 in)
190777.2 mm (3.0 in)
190860.7 mm (2.4 in)
190968.8 mm (2.7 in)
191068.3 mm (2.7 in)
1911112.5 mm (4.4 in)
191268.8 mm (2.7 in)
1913122.2 mm (4.8 in)
191446.0 mm (1.8 in)
191563.5 mm (2.5 in)
191671.9 mm (2.8 in)
191762.5 mm (2.5 in)
191855.1 mm (2.2 in)
191977.0 mm (3.0 in)
192054.6 mm (2.1 in)
192178.7 mm (3.1 in)
192248.0 mm (1.9 in)
192398.3 mm (3.9 in)
1924104.6 mm (4.1 in)
192562.5 mm (2.5 in)
1926163.3 mm (6.4 in)
192755.9 mm (2.2 in)
192870.1 mm (2.8 in)
192946.7 mm (1.8 in)
193047.8 mm (1.9 in)
1931118.4 mm (4.7 in)
193257.2 mm (2.3 in)
1933115.6 mm (4.6 in)
193477.7 mm (3.1 in)
193553.8 mm (2.1 in)
193672.9 mm (2.9 in)
193768.6 mm (2.7 in)
193863.5 mm (2.5 in)
193941.1 mm (1.6 in)
194041.4 mm (1.6 in)
194148.0 mm (1.9 in)
194236.6 mm (1.4 in)
194361.0 mm (2.4 in)
194459.4 mm (2.3 in)
194571.4 mm (2.8 in)
194667.8 mm (2.7 in)
194769.9 mm (2.8 in)
194885.3 mm (3.4 in)
194963.0 mm (2.5 in)
195067.6 mm (2.7 in)
195178.7 mm (3.1 in)
195254.1 mm (2.1 in)
195358.4 mm (2.3 in)
195468.6 mm (2.7 in)
195564.0 mm (2.5 in)
195632.8 mm (1.3 in)
195769.6 mm (2.7 in)
195870.9 mm (2.8 in)
195995.3 mm (3.8 in)
196064.3 mm (2.5 in)
1961136.4 mm (5.4 in)
196259.7 mm (2.4 in)
196363.0 mm (2.5 in)
196492.2 mm (3.6 in)
196564.5 mm (2.5 in)
196657.4 mm (2.3 in)
196752.6 mm (2.1 in)
196844.2 mm (1.7 in)
196985.9 mm (3.4 in)
197050.0 mm (2.0 in)
197162.2 mm (2.4 in)
197245.7 mm (1.8 in)
197355.4 mm (2.2 in)
197436.8 mm (1.4 in)
197545.5 mm (1.8 in)
197635.6 mm (1.4 in)
197761.0 mm (2.4 in)
197879.2 mm (3.1 in)
197966.3 mm (2.6 in)
198068.1 mm (2.7 in)
198148.3 mm (1.9 in)
1982100.3 mm (3.9 in)
198385.1 mm (3.4 in)
198479.2 mm (3.1 in)
198582.3 mm (3.2 in)
198652.1 mm (2.1 in)
198765.3 mm (2.6 in)
198862.5 mm (2.5 in)
198963.8 mm (2.5 in)
199065.5 mm (2.6 in)
199172.4 mm (2.9 in)
199250.0 mm (2.0 in)
1993135.6 mm (5.3 in)
199443.2 mm (1.7 in)
199581.3 mm (3.2 in)
199680.0 mm (3.1 in)
199754.1 mm (2.1 in)
199867.1 mm (2.6 in)
1999105.9 mm (4.2 in)
200094.7 mm (3.7 in)
200155.9 mm (2.2 in)
200281.3 mm (3.2 in)
200367.8 mm (2.7 in)
200478.5 mm (3.1 in)
200553.6 mm (2.1 in)
200656.4 mm (2.2 in)
200785.9 mm (3.4 in)
200894.2 mm (3.7 in)
200986.6 mm (3.4 in)
201083.6 mm (3.3 in)
201174.9 mm (2.9 in)
201271.9 mm (2.8 in)
201387.1 mm (3.4 in)
201464.0 mm (2.5 in)
201583.8 mm (3.3 in)
201668.6 mm (2.7 in)
201746.5 mm (1.8 in)
201882.6 mm (3.3 in)
201955.9 mm (2.2 in)
202089.7 mm (3.5 in)
202151.1 mm (2.0 in)
202286.6 mm (3.4 in)
202380.8 mm (3.2 in)
202457.7 mm (2.3 in)
202579.5 mm (3.1 in)
202672.6 mm (2.9 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Olney 2S by year The wettest five days of the year at Olney 2S, 1893 to 2026. The record is 289.9 mm (11.4 in) in 1961, marked on the chart; the median year is 105.1 mm (4.1 in). 01002003001900192019401960198020002020Record: 289.9 mm (11.4 in) in 1961
The wettest five days of the year at Olney 2S, 1893 to 2026. The record is 289.9 mm (11.4 in) in 1961, marked on the chart; the median year is 105.1 mm (4.1 in).
Wettest five days (Rx5day) at Olney 2S by year
YearWettest five days (Rx5day)
1893104.2 mm (4.1 in)
189468.4 mm (2.7 in)
189588.1 mm (3.5 in)
1896164.6 mm (6.5 in)
1897167.9 mm (6.6 in)
1898125.0 mm (4.9 in)
189952.5 mm (2.1 in)
190071.6 mm (2.8 in)
190191.7 mm (3.6 in)
190282.8 mm (3.3 in)
190382.3 mm (3.2 in)
1904166.4 mm (6.6 in)
1905141.7 mm (5.6 in)
1906135.9 mm (5.4 in)
190799.8 mm (3.9 in)
1908119.9 mm (4.7 in)
190984.3 mm (3.3 in)
1910154.0 mm (6.1 in)
1911112.5 mm (4.4 in)
191275.9 mm (3.0 in)
1913181.4 mm (7.1 in)
1914118.9 mm (4.7 in)
1915153.2 mm (6.0 in)
1916143.1 mm (5.6 in)
191791.9 mm (3.6 in)
1918140.7 mm (5.5 in)
1919150.3 mm (5.9 in)
192076.0 mm (3.0 in)
1921117.5 mm (4.6 in)
192289.6 mm (3.5 in)
1923113.8 mm (4.5 in)
1924109.4 mm (4.3 in)
192574.1 mm (2.9 in)
1926191.5 mm (7.5 in)
192783.2 mm (3.3 in)
192891.9 mm (3.6 in)
192975.1 mm (3.0 in)
193091.3 mm (3.6 in)
1931140.0 mm (5.5 in)
193299.1 mm (3.9 in)
1933126.3 mm (5.0 in)
193497.5 mm (3.8 in)
193583.5 mm (3.3 in)
193691.2 mm (3.6 in)
193795.4 mm (3.8 in)
1938103.1 mm (4.1 in)
193988.3 mm (3.5 in)
194075.4 mm (3.0 in)
1941103.9 mm (4.1 in)
194264.0 mm (2.5 in)
1943135.9 mm (5.4 in)
194498.7 mm (3.9 in)
1945151.2 mm (6.0 in)
1946148.1 mm (5.8 in)
194785.8 mm (3.4 in)
1948113.2 mm (4.5 in)
1949104.6 mm (4.1 in)
1950138.3 mm (5.4 in)
1951112.3 mm (4.4 in)
195281.6 mm (3.2 in)
195373.9 mm (2.9 in)
195495.6 mm (3.8 in)
195587.9 mm (3.5 in)
195645.4 mm (1.8 in)
1957126.5 mm (5.0 in)
1958140.0 mm (5.5 in)
1959147.3 mm (5.8 in)
196093.5 mm (3.7 in)
1961289.9 mm (11.4 in)
196282.3 mm (3.2 in)
196388.6 mm (3.5 in)
1964135.9 mm (5.4 in)
1965122.1 mm (4.8 in)
1966116.3 mm (4.6 in)
196782.0 mm (3.2 in)
196871.2 mm (2.8 in)
1969152.4 mm (6.0 in)
197078.5 mm (3.1 in)
197162.5 mm (2.5 in)
197298.4 mm (3.9 in)
1973124.5 mm (4.9 in)
197482.1 mm (3.2 in)
197584.6 mm (3.3 in)
197663.8 mm (2.5 in)
197791.5 mm (3.6 in)
197899.8 mm (3.9 in)
1979143.3 mm (5.6 in)
198088.9 mm (3.5 in)
198158.4 mm (2.3 in)
1982121.2 mm (4.8 in)
1983136.1 mm (5.4 in)
198499.0 mm (3.9 in)
1985136.2 mm (5.4 in)
198657.9 mm (2.3 in)
198794.8 mm (3.7 in)
1988103.5 mm (4.1 in)
1989114.6 mm (4.5 in)
199090.4 mm (3.6 in)
199194.2 mm (3.7 in)
1992105.6 mm (4.2 in)
1993186.1 mm (7.3 in)
199499.9 mm (3.9 in)
1995168.4 mm (6.6 in)
1996172.5 mm (6.8 in)
199795.2 mm (3.7 in)
1998110.1 mm (4.3 in)
1999123.7 mm (4.9 in)
2000155.2 mm (6.1 in)
2001165.1 mm (6.5 in)
2002114.9 mm (4.5 in)
2003138.1 mm (5.4 in)
2004152.2 mm (6.0 in)
2005140.6 mm (5.5 in)
2006145.7 mm (5.7 in)
200789.0 mm (3.5 in)
2008149.6 mm (5.9 in)
2009117.9 mm (4.6 in)
2010120.9 mm (4.8 in)
2011185.3 mm (7.3 in)
201295.9 mm (3.8 in)
2013169.4 mm (6.7 in)
2014120.0 mm (4.7 in)
2015137.8 mm (5.4 in)
201686.9 mm (3.4 in)
2017109.0 mm (4.3 in)
2018141.5 mm (5.6 in)
2019128.6 mm (5.1 in)
2020104.4 mm (4.1 in)
202181.3 mm (3.2 in)
2022108.5 mm (4.3 in)
2023102.9 mm (4.1 in)
2024143.0 mm (5.6 in)
2025180.8 mm (7.1 in)
202683.1 mm (3.3 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Olney 2S by year The longest dry spell of the year at Olney 2S, 1893 to 2026. The record is 42 days in 1955, marked on the chart; the median year is 19 days. 10203040501900192019401960198020002020Record: 42 days in 1955
The longest dry spell of the year at Olney 2S, 1893 to 2026. The record is 42 days in 1955, marked on the chart; the median year is 19 days.
Longest dry spell (CDD) at Olney 2S by year
YearLongest dry spell (CDD)
189322 days
189420 days
189527 days
189622 days
189724 days
189818 days
189926 days
190015 days
190130 days
190219 days
190325 days
190428 days
190517 days
190620 days
190718 days
190838 days
190918 days
191024 days
191112 days
191220 days
191320 days
191427 days
191528 days
191619 days
191733 days
191824 days
191925 days
192031 days
192118 days
192224 days
192323 days
192423 days
192518 days
192617 days
192720 days
192811 days
192913 days
193024 days
193124 days
193215 days
193317 days
193420 days
193517 days
193629 days
193719 days
193830 days
193920 days
194014 days
194119 days
194222 days
194325 days
194423 days
194519 days
194623 days
194729 days
194818 days
194914 days
195020 days
195116 days
195218 days
195326 days
195417 days
195542 days
195633 days
195722 days
195828 days
195924 days
196028 days
196116 days
196216 days
196342 days
196419 days
196522 days
196619 days
196719 days
196817 days
196917 days
197019 days
197126 days
197215 days
197315 days
197416 days
197515 days
197626 days
197721 days
197817 days
197918 days
198022 days
198113 days
198216 days
198326 days
198417 days
198513 days
198618 days
198718 days
198824 days
198915 days
199016 days
199121 days
199222 days
199317 days
199417 days
199526 days
199616 days
199716 days
199829 days
199933 days
200020 days
200117 days
200224 days
200315 days
200429 days
200522 days
200616 days
200722 days
200818 days
200916 days
201020 days
201141 days
201219 days
201318 days
201414 days
201525 days
201618 days
201718 days
201814 days
201913 days
202018 days
202111 days
202216 days
202321 days
202431 days
202516 days
202619 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

109 years with a frost

Across 109 years with a frost, the median last spring frost at Olney 2S falls on 16 April and the median first autumn frost on 18 October, which leaves a median of 185 days between them.

In 1991 to 2025 the median growing season was 192 days. That is 6 days more than in 1897 to 1932.

Fitted over all years, the growing season changes by +0.2 days per decade at this station.

Frost dates and growing season at Olney 2S
MeasureMedian, all yearsEarliest period (1897 to 1932)Recent period (1991 to 2025)Recent against earliestFitted trend
Last spring frost16 April17 April10 April7 days earlier-0.3 days per decade
First autumn frost18 October18 October20 October2 days later-0.1 days per decade
Growing days185 days186 days192 days6 days more+0.2 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

122 years, 1893 to 2025

A day with at least 66.3 mm (2.6 in) of rain is expected about once in 2 years. A day with at least 153.0 mm (6.0 in) of rain is expected about once in 100 years.

Rainfall return levels at Olney 2S: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years66.3 mm (2.6 in)
5 years86.9 mm (3.4 in)
10 years101.5 mm (4.0 in)
25 years121.2 mm (4.8 in)
50 years136.7 mm (5.4 in)
100 years153.0 mm (6.0 in)

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 122 years of values from 1893 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: 163.3 mm (6.4 in) in 1926; 160.0 mm (6.3 in) in 1904; 136.4 mm (5.4 in) in 1961.

Station Changes

1 suspected

One change was suspected in the annual mean temperature of Olney 2S, at 1998. Each is measured against neighbouring stations.

  • Relative to 5 neighbouring stations, the station's annual mean temperature from 1998 ran 0.3 C (0.5 F) lower than in the years before (likely change).
Suspected changes in the annual mean temperature at Olney 2S, against neighbouring stations
YearShift (C)Shift (F)StrengthNeighbours
1998-0.3-0.5likely5

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

2008 to 2025 against 1961 to 1990

Over 2008 to 2025, Olney 2S had a mean temperature of 12.6 C (54.7 F) and 1,288.8 mm (50.7 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Rough Rvr Lake (United States, 183 km away), Marion 4 NNE (United States, 125 km away) and Tell City (United States, 141 km away).

Climate twins of Olney 2S: stations whose 1961 to 1990 climate is closest to its 2008 to 2025 climate
Twin stationCountryDistance awayMean temperature, 1961-1990Rain a year, 1961-1990Climate difference
Rough Rvr LakeUnited States183 km (114 mi)12.5 C (54.4 F)1,259.9 mm (49.6 in)0.67
Marion 4 NNEUnited States125 km (78 mi)12.5 C (54.5 F)1,197.9 mm (47.2 in)0.71
Tell CityUnited States141 km (88 mi)13.0 C (55.5 F)1,204.3 mm (47.4 in)0.80

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 Olney 2S standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Olney 2S 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 2026-10-16 (16 October 2026). Records are computed by this site and are not official.

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