Built 2026-10-17 (17 October 2026)

Galesburg Weather Records (USC00113320)

Record envelope, standing records and threshold days for Galesburg (USC00113320), Illinois, United States, with 132 years of record.

Key Facts for Galesburg

  • Galesburg (USC00113320) is a weather station in Illinois, United States at 40.95 latitude and -90.39 longitude, 232 m (761 ft) above sea level.
  • The station reports from 1895 to 2026, 132 years of record.
  • 1,464 records set at Galesburg still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Galesburg tied a daily record high minimum temperature of 17.8 C (64.0 F) on 13 October 2026 (provisional).

Provisional Records

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

About the Station

  • Location: Illinois, United States, 40.95 latitude, -90.39 longitude.
  • Elevation: 232 m (761 ft).
  • Period of record: 1895 to 2026, 132 years.
  • Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

9 days at or beyond a record
Daily record high and record low at Galesburg, with 2026 drawn through them The band shows the record high and record low for each calendar day at Galesburg. The lines show the 2026 daily maximum and minimum. 9 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 Galesburg. The lines show the 2026 daily maximum and minimum. 9 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Galesburg, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan20.0 C (68.0 F)-32.8 C (-27.0 F)15.0 C (59.0 F)-24.4 C (-11.9 F)
Feb23.3 C (73.9 F)-33.3 C (-27.9 F)21.1 C (70.0 F)-16.7 C (1.9 F)
Mar30.0 C (86.0 F)-25.6 C (-14.1 F)29.4 C (84.9 F)-15.0 C (5.0 F)
Apr32.8 C (91.0 F)-12.8 C (9.0 F)28.9 C (84.0 F)-0.6 C (30.9 F)
May35.6 C (96.1 F)-4.4 C (24.1 F)31.7 C (89.1 F)1.1 C (34.0 F)
Jun38.9 C (102.0 F)2.2 C (36.0 F)32.2 C (90.0 F)10.6 C (51.1 F)
Jul44.4 C (111.9 F)5.6 C (42.1 F)34.4 C (93.9 F)13.9 C (57.0 F)
Aug38.9 C (102.0 F)5.0 C (41.0 F)31.7 C (89.1 F)13.3 C (55.9 F)
Sep37.8 C (100.0 F)-7.2 C (19.0 F)35.0 C (95.0 F)10.6 C (51.1 F)
Oct34.4 C (93.9 F)-8.3 C (17.1 F)31.1 C (88.0 F)7.2 C (45.0 F)
Nov26.1 C (79.0 F)-21.1 C (-6.0 F)n/an/a
Dec22.2 C (72.0 F)-30.0 C (-22.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Galesburg by the year they were set 1,464 records at Galesburg still stand. 1899 holds the most, with 39. 0102030401896: 41897: 141898: 101899: 391900: 201901: 311902: 201903: 141904: 231905: 131906: 111907: 91908: 131909: 331936: 371937: 211938: 101939: 141940: 151941: 111942: 211943: 121944: 131945: 171946: 111947: 281948: 121949: 121950: 201951: 61952: 181953: 121954: 141955: 81956: 141957: 91958: 91959: 91960: 171961: 81962: 191963: 251964: 121965: 141966: 141967: 151968: 141969: 41970: 91971: 181972: 191973: 91974: 131975: 71976: 221977: 171978: 41979: 121980: 21981: 51982: 161983: 201984: 131985: 121986: 131987: 101988: 241989: 221990: 191991: 221992: 111993: 111994: 131995: 41996: 151997: 91998: 141999: 62000: 162001: 132002: 122003: 42004: 112005: 162006: 222007: 182008: 72009: 82010: 42011: 112012: 272013: 102014: 152015: 132016: 92017: 172018: 172019: 142020: 132021: 82022: 132023: 32024: 82025: 32026: 121896190719441955196619771988199920102021
1,464 records at Galesburg still stand. 1899 holds the most, with 39.
Standing records at Galesburg by the year they were set
Year setStanding records
18964
189714
189810
189939
190020
190131
190220
190314
190423
190513
190611
19079
190813
190933
193637
193721
193810
193914
194015
194111
194221
194312
194413
194517
194611
194728
194812
194912
195020
19516
195218
195312
195414
19558
195614
19579
19589
19599
196017
19618
196219
196325
196412
196514
196614
196715
196814
19694
19709
197118
197219
19739
197413
19757
197622
197717
19784
197912
19802
19815
198216
198320
198413
198512
198613
198710
198824
198922
199019
199122
199211
199311
199413
19954
199615
19979
199814
19996
200016
200113
200212
20034
200411
200516
200622
200718
20087
20098
20104
201111
201227
201310
201415
201513
20169
201717
201817
201914
202013
20218
202213
20233
20248
20253
202612

All-Time Record Progression

5 new records
When Galesburg set new all-time records 5 all-time records were set at Galesburg between 13 January 1979 and 2 February 2011. Each dot is a new record. Record snow depthRecord low maximum temperatureRecord daily snowfall13 January 1979: Record snow depth 45.7 cm (18.0 in)14 January 1979: Record snow depth 66.0 cm (26.0 in)24 December 1983: Record low maximum temperature -23.9 C (-11.0 F)18 January 1994: Record low maximum temperature -24.4 C (-11.9 F)2 February 2011: Record daily snowfall 38.1 cm (15.0 in)1980198519901995200020052010
5 all-time records were set at Galesburg between 13 January 1979 and 2 February 2011. Each dot is a new record.
When Galesburg set new all-time records
DateKindDetail
1979-01-13Record snow depthRecord snow depth 45.7 cm (18.0 in)
1979-01-14Record snow depthRecord snow depth 66.0 cm (26.0 in)
1983-12-24Record low maximum temperatureRecord low maximum temperature -23.9 C (-11.0 F)
1994-01-18Record low maximum temperatureRecord low maximum temperature -24.4 C (-11.9 F)
2011-02-02Record daily snowfallRecord daily snowfall 38.1 cm (15.0 in)

Wettest Day of Each Month

Sep: 195.6 mm (7.7 in)
Record daily precipitation for each month at Galesburg The wettest day on record for each calendar month at Galesburg. The most was 195.6 mm (7.7 in) on 8 September 1927. 050100150200 Jan: 63.5 mm (2.5 in), 2 January 1897 Jan Feb: 70.1 mm (2.8 in), 21 February 1997 Feb Mar: 104.4 mm (4.1 in), 25 March 1954 Mar Apr: 105.7 mm (4.2 in), 18 April 2013 Apr May: 91.9 mm (3.6 in), 16 May 2009 May Jun: 104.4 mm (4.1 in), 14 June 1970 Jun Jul: 155.7 mm (6.1 in), 24 July 1993 Jul Aug: 137.2 mm (5.4 in), 16 August 1898 Aug Sep: 195.6 mm (7.7 in), 8 September 1927 Sep Oct: 105.9 mm (4.2 in), 3 October 1941 Oct Nov: 66.3 mm (2.6 in), 19 November 1954 Nov Dec: 83.3 mm (3.3 in), 9 December 2003 Dec
The wettest day on record for each calendar month at Galesburg. The most was 195.6 mm (7.7 in) on 8 September 1927.
Record daily precipitation for each month at Galesburg
MonthRecord daily precipitation (mm)Date
Jan63.5 mm (2.5 in)2 January 1897
Feb70.1 mm (2.8 in)21 February 1997
Mar104.4 mm (4.1 in)25 March 1954
Apr105.7 mm (4.2 in)18 April 2013
May91.9 mm (3.6 in)16 May 2009
Jun104.4 mm (4.1 in)14 June 1970
Jul155.7 mm (6.1 in)24 July 1993
Aug137.2 mm (5.4 in)16 August 1898
Sep195.6 mm (7.7 in)8 September 1927
Oct105.9 mm (4.2 in)3 October 1941
Nov66.3 mm (2.6 in)19 November 1954
Dec83.3 mm (3.3 in)9 December 2003

Period of Record Coverage

1896 to 2026
Days with data per year at Galesburg 105 years of record at Galesburg, 1896 to 2026. 8 years have data for under 90 percent of days and are left out of rankings: 1896, 1897, 1907, 1936, 1948, 1978, 2004, 2026. 1896: 58 of 366 days1897: 181 of 365 days1898: 363 of 365 days1899: 363 of 365 days1900: 346 of 365 days1901: 348 of 365 days1902: 331 of 365 days1903: 330 of 365 days1904: 354 of 366 days1905: 349 of 365 days1906: 357 of 365 days1907: 225 of 365 days1908: 356 of 366 days1909: 356 of 365 days1936: 202 of 366 days1937: 354 of 365 days1938: 357 of 365 days1939: 355 of 365 days1940: 355 of 366 days1941: 355 of 365 days1942: 341 of 365 days1943: 359 of 365 days1944: 351 of 366 days1945: 355 of 365 days1946: 355 of 365 days1947: 363 of 365 days1948: 324 of 366 days1949: 364 of 365 days1950: 363 of 365 days1951: 363 of 365 days1952: 365 of 366 days1953: 365 of 365 days1954: 364 of 365 days1955: 365 of 365 days1956: 365 of 366 days1957: 365 of 365 days1958: 347 of 365 days1959: 362 of 365 days1960: 366 of 366 days1961: 364 of 365 days1962: 365 of 365 days1963: 365 of 365 days1964: 365 of 366 days1965: 365 of 365 days1966: 364 of 365 days1967: 362 of 365 days1968: 365 of 366 days1969: 365 of 365 days1970: 365 of 365 days1971: 364 of 365 days1972: 366 of 366 days1973: 365 of 365 days1974: 364 of 365 days1975: 365 of 365 days1976: 365 of 366 days1977: 363 of 365 days1978: 327 of 365 days1979: 365 of 365 days1980: 365 of 366 days1981: 364 of 365 days1982: 361 of 365 days1983: 363 of 365 days1984: 365 of 366 days1985: 364 of 365 days1986: 364 of 365 days1987: 362 of 365 days1988: 358 of 366 days1989: 364 of 365 days1990: 363 of 365 days1991: 365 of 365 days1992: 364 of 366 days1993: 365 of 365 days1994: 364 of 365 days1995: 362 of 365 days1996: 363 of 366 days1997: 364 of 365 days1998: 362 of 365 days1999: 364 of 365 days2000: 365 of 366 days2001: 362 of 365 days2002: 364 of 365 days2003: 355 of 365 days2004: 327 of 366 days2005: 355 of 365 days2006: 357 of 365 days2007: 354 of 365 days2008: 362 of 366 days2009: 365 of 365 days2010: 365 of 365 days2011: 364 of 365 days2012: 366 of 366 days2013: 364 of 365 days2014: 365 of 365 days2015: 365 of 365 days2016: 357 of 366 days2017: 361 of 365 days2018: 363 of 365 days2019: 361 of 365 days2020: 365 of 366 days2021: 364 of 365 days2022: 363 of 365 days2023: 365 of 365 days2024: 366 of 366 days2025: 362 of 365 days2026: 285 of 365 days1905195019651980199520102025
105 years of record at Galesburg, 1896 to 2026. 8 years have data for under 90 percent of days and are left out of rankings: 1896, 1897, 1907, 1936, 1948, 1978, 2004, 2026.
Days with data per year at Galesburg
YearDays with dataShare of yearComplete
18965816%No
189718150%No
189836399%Yes
189936399%Yes
190034695%Yes
190134895%Yes
190233191%Yes
190333090%Yes
190435497%Yes
190534996%Yes
190635798%Yes
190722562%No
190835697%Yes
190935698%Yes
193620255%No
193735497%Yes
193835798%Yes
193935597%Yes
194035597%Yes
194135597%Yes
194234193%Yes
194335998%Yes
194435196%Yes
194535597%Yes
194635597%Yes
194736399%Yes
194832489%No
1949364100%Yes
195036399%Yes
195136399%Yes
1952365100%Yes
1953365100%Yes
1954364100%Yes
1955365100%Yes
1956365100%Yes
1957365100%Yes
195834795%Yes
195936299%Yes
1960366100%Yes
1961364100%Yes
1962365100%Yes
1963365100%Yes
1964365100%Yes
1965365100%Yes
1966364100%Yes
196736299%Yes
1968365100%Yes
1969365100%Yes
1970365100%Yes
1971364100%Yes
1972366100%Yes
1973365100%Yes
1974364100%Yes
1975365100%Yes
1976365100%Yes
197736399%Yes
197832790%No
1979365100%Yes
1980365100%Yes
1981364100%Yes
198236199%Yes
198336399%Yes
1984365100%Yes
1985364100%Yes
1986364100%Yes
198736299%Yes
198835898%Yes
1989364100%Yes
199036399%Yes
1991365100%Yes
199236499%Yes
1993365100%Yes
1994364100%Yes
199536299%Yes
199636399%Yes
1997364100%Yes
199836299%Yes
1999364100%Yes
2000365100%Yes
200136299%Yes
2002364100%Yes
200335597%Yes
200432789%No
200535597%Yes
200635798%Yes
200735497%Yes
200836299%Yes
2009365100%Yes
2010365100%Yes
2011364100%Yes
2012366100%Yes
2013364100%Yes
2014365100%Yes
2015365100%Yes
201635798%Yes
201736199%Yes
201836399%Yes
201936199%Yes
2020365100%Yes
2021364100%Yes
202236399%Yes
2023365100%Yes
2024366100%Yes
202536299%Yes
202628578%No

Latest Records

20
Latest records at Galesburg
DateStationRecordValueBeat old record byOld record stoodSignificance
13 October 2026Galesburg, USdaily high min (Tie, Provisional)17.8 C (64.0 F)tie126 years10 of 100 (Routine)
5 September 2026Galesburg, USmonthly high min (Tie, Provisional)23.9 C (75.0 F)tie0 years5 of 100 (Routine)
4 September 2026Galesburg, USmonthly high min (Provisional)23.9 C (75.0 F)0.6 C (1.1 F)87 years47 of 100 (Notable)
4 September 2026Galesburg, USdaily high max (Tie, Provisional)34.4 C (93.9 F)tie126 years10 of 100 (Routine)
3 September 2026Galesburg, USmonthly high min (Tie, Provisional)23.3 C (73.9 F)tie87 years11 of 100 (Routine)
2 September 2026Galesburg, USmonthly high min (Tie, Provisional)23.3 C (73.9 F)tie86 years11 of 100 (Routine)
14 August 2026Galesburg, USdaily rain61.0 mm (2.4 in)5.1 mm (0.20 in)45 years26 of 100 (Routine)
13 August 2026Galesburg, USdaily rain55.9 mm (2.2 in)22.9 mm (0.9 in)93 years53 of 100 (Notable)
2 August 2026Galesburg, USdaily low max21.1 C (70.0 F)1.1 C (2.0 F)76 years35 of 100 (Notable)
30 June 2026Galesburg, USdaily high min24.4 C (75.9 F)0.5 C (0.9 F)24 years18 of 100 (Routine)
22 June 2026Galesburg, USdaily low max17.8 C (64.0 F)0.5 C (0.9 F)75 years33 of 100 (Routine)
18 June 2026Galesburg, USdaily rain47.2 mm (1.9 in)9.4 mm (0.37 in)76 years38 of 100 (Notable)
11 June 2026Galesburg, USdaily rain62.0 mm (2.4 in)17.5 mm (0.7 in)124 years52 of 100 (Notable)
10 June 2026Galesburg, USdaily high min (Tie)22.2 C (72.0 F)tie24 years4 of 100 (Routine)
13 April 2026Galesburg, USdaily high min (Tie)15.0 C (59.0 F)tie84 years8 of 100 (Routine)
31 March 2026Galesburg, USdaily high max28.9 C (84.0 F)1.1 C (2.0 F)40 years23 of 100 (Routine)
27 March 2026Galesburg, USdaily high max27.8 C (82.0 F)0.6 C (1.1 F)80 years34 of 100 (Routine)
22 March 2026Galesburg, USdaily high max29.4 C (84.9 F)2.2 C (4.0 F)13 years17 of 100 (Routine)
18 March 2026Galesburg, USdaily low min (Tie)-15.0 C (5.0 F)tie120 years10 of 100 (Routine)
11 March 2026Galesburg, USdaily high max27.8 C (82.0 F)2.2 C (4.0 F)53 years29 of 100 (Routine)

Climate Trend

93 complete years, 1898 to 2025
Annual mean temperature at Galesburg as warming stripes, 1898 to 2025 One stripe for each of 93 complete years at Galesburg, 1898 to 2025. Blue stripes are years cooler than the station's own mean of 10.2 C (50.4 F); red stripes are warmer. The coolest year was 2014, at 8.1 C (46.5 F), and the warmest was 2006, at 12.3 C (54.1 F). The strongest colour marks a difference of 2.2 C (4.0 F). 1898: 9.8 C, -0.4 C from the station mean1899: 9.6 C, -0.7 C from the station mean1901: 9.2 C, -1.0 C from the station mean1904: 8.4 C, -1.9 C from the station mean1905: 9.3 C, -1.0 C from the station mean1906: 10.2 C, 0.0 C from the station mean1908: 10.3 C, +0.1 C from the station mean1909: 9.6 C, -0.7 C from the station mean1937: 9.2 C, -1.0 C from the station mean1938: 11.3 C, +1.1 C from the station mean1939: 10.9 C, +0.7 C from the station mean1940: 9.5 C, -0.7 C from the station mean1941: 11.2 C, +0.9 C from the station mean1942: 10.1 C, -0.2 C from the station mean1943: 9.4 C, -0.9 C from the station mean1944: 10.3 C, +0.1 C from the station mean1945: 9.1 C, -1.1 C from the station mean1946: 11.4 C, +1.2 C from the station mean1947: 10.6 C, +0.3 C from the station mean1949: 11.5 C, +1.3 C from the station mean1950: 9.7 C, -0.5 C from the station mean1951: 9.6 C, -0.6 C from the station mean1952: 11.0 C, +0.8 C from the station mean1953: 11.3 C, +1.0 C from the station mean1954: 11.2 C, +1.0 C from the station mean1955: 10.6 C, +0.4 C from the station mean1956: 10.7 C, +0.5 C from the station mean1957: 10.5 C, +0.2 C from the station mean1959: 10.1 C, -0.1 C from the station mean1960: 9.4 C, -0.8 C from the station mean1961: 10.0 C, -0.3 C from the station mean1962: 9.8 C, -0.5 C from the station mean1963: 9.9 C, -0.4 C from the station mean1964: 10.6 C, +0.4 C from the station mean1965: 10.2 C, -0.1 C from the station mean1966: 9.8 C, -0.5 C from the station mean1967: 9.5 C, -0.7 C from the station mean1968: 10.0 C, -0.2 C from the station mean1969: 9.7 C, -0.5 C from the station mean1970: 10.0 C, -0.3 C from the station mean1971: 10.6 C, +0.3 C from the station mean1972: 9.2 C, -1.0 C from the station mean1973: 11.1 C, +0.8 C from the station mean1974: 10.3 C, 0.0 C from the station mean1975: 10.4 C, +0.1 C from the station mean1976: 9.5 C, -0.8 C from the station mean1977: 9.7 C, -0.5 C from the station mean1979: 8.8 C, -1.5 C from the station mean1980: 9.9 C, -0.3 C from the station mean1981: 10.2 C, 0.0 C from the station mean1982: 9.5 C, -0.8 C from the station mean1983: 10.5 C, +0.3 C from the station mean1984: 10.1 C, -0.1 C from the station mean1985: 9.3 C, -1.0 C from the station mean1986: 10.7 C, +0.4 C from the station mean1987: 11.9 C, +1.6 C from the station mean1988: 10.7 C, +0.5 C from the station mean1989: 9.3 C, -0.9 C from the station mean1990: 11.1 C, +0.8 C from the station mean1991: 11.0 C, +0.8 C from the station mean1992: 10.0 C, -0.2 C from the station mean1993: 9.3 C, -0.9 C from the station mean1994: 10.2 C, 0.0 C from the station mean1995: 9.8 C, -0.5 C from the station mean1996: 9.0 C, -1.2 C from the station mean1997: 9.7 C, -0.5 C from the station mean1998: 12.0 C, +1.8 C from the station mean1999: 11.2 C, +0.9 C from the station mean2000: 10.3 C, 0.0 C from the station mean2001: 11.1 C, +0.8 C from the station mean2002: 10.9 C, +0.6 C from the station mean2003: 10.2 C, -0.1 C from the station mean2005: 12.1 C, +1.9 C from the station mean2006: 12.3 C, +2.0 C from the station mean2007: 11.6 C, +1.4 C from the station mean2008: 9.2 C, -1.1 C from the station mean2009: 9.2 C, -1.0 C from the station mean2010: 10.2 C, 0.0 C from the station mean2011: 10.2 C, 0.0 C from the station mean2012: 12.0 C, +1.7 C from the station mean2013: 9.2 C, -1.0 C from the station mean2014: 8.1 C, -2.2 C from the station mean2015: 10.2 C, 0.0 C from the station mean2016: 11.2 C, +1.0 C from the station mean2017: 10.9 C, +0.6 C from the station mean2018: 9.8 C, -0.4 C from the station mean2019: 9.6 C, -0.6 C from the station mean2020: 10.4 C, +0.1 C from the station mean2021: 10.8 C, +0.5 C from the station mean2022: 9.6 C, -0.7 C from the station mean2023: 11.3 C, +1.1 C from the station mean2024: 11.8 C, +1.5 C from the station mean2025: 10.9 C, +0.6 C from the station mean1898191019201930194019501960197019801990200020102020
One stripe for each of 93 complete years at Galesburg, 1898 to 2025. Blue stripes are years cooler than the station's own mean of 10.2 C (50.4 F); red stripes are warmer. The coolest year was 2014, at 8.1 C (46.5 F), and the warmest was 2006, at 12.3 C (54.1 F). The strongest colour marks a difference of 2.2 C (4.0 F).
Annual mean temperature at Galesburg as warming stripes, 1898 to 2025
YearAnnual mean temperatureDifference from the station mean
18989.8 C-0.42 C
18999.6 C-0.68 C
19019.2 C-1.05 C
19048.4 C-1.86 C
19059.3 C-0.97 C
190610.2 C-0.04 C
190810.3 C+0.10 C
19099.6 C-0.68 C
19379.2 C-1.05 C
193811.3 C+1.05 C
193910.9 C+0.67 C
19409.5 C-0.71 C
194111.2 C+0.94 C
194210.1 C-0.17 C
19439.4 C-0.87 C
194410.3 C+0.06 C
19459.1 C-1.11 C
194611.4 C+1.16 C
194710.6 C+0.34 C
194911.5 C+1.28 C
19509.7 C-0.52 C
19519.6 C-0.65 C
195211.0 C+0.76 C
195311.3 C+1.02 C
195411.2 C+0.97 C
195510.6 C+0.35 C
195610.7 C+0.49 C
195710.5 C+0.21 C
195910.1 C-0.13 C
19609.4 C-0.80 C
196110.0 C-0.26 C
19629.8 C-0.46 C
19639.9 C-0.36 C
196410.6 C+0.38 C
196510.2 C-0.07 C
19669.8 C-0.49 C
19679.5 C-0.74 C
196810.0 C-0.24 C
19699.7 C-0.51 C
197010.0 C-0.29 C
197110.6 C+0.33 C
19729.2 C-1.01 C
197311.1 C+0.81 C
197410.3 C+0.03 C
197510.4 C+0.14 C
19769.5 C-0.76 C
19779.7 C-0.53 C
19798.8 C-1.48 C
19809.9 C-0.34 C
198110.2 C-0.02 C
19829.5 C-0.76 C
198310.5 C+0.29 C
198410.1 C-0.13 C
19859.3 C-0.97 C
198610.7 C+0.44 C
198711.9 C+1.64 C
198810.7 C+0.50 C
19899.3 C-0.90 C
199011.1 C+0.83 C
199111.0 C+0.80 C
199210.0 C-0.24 C
19939.3 C-0.94 C
199410.2 C+0.00 C
19959.8 C-0.49 C
19969.0 C-1.22 C
19979.7 C-0.52 C
199812.0 C+1.79 C
199911.2 C+0.94 C
200010.3 C+0.04 C
200111.1 C+0.84 C
200210.9 C+0.63 C
200310.2 C-0.07 C
200512.1 C+1.88 C
200612.3 C+2.01 C
200711.6 C+1.39 C
20089.2 C-1.09 C
20099.2 C-1.00 C
201010.2 C-0.05 C
201110.2 C+0.00 C
201212.0 C+1.74 C
20139.2 C-1.01 C
20148.1 C-2.18 C
201510.2 C-0.01 C
201611.2 C+0.96 C
201710.9 C+0.61 C
20189.8 C-0.42 C
20199.6 C-0.61 C
202010.4 C+0.14 C
202110.8 C+0.52 C
20229.6 C-0.66 C
202311.3 C+1.07 C
202411.8 C+1.52 C
202510.9 C+0.64 C

The annual mean temperature here has risen by 0.06 C (0.01 to 0.11) per decade over 1898 to 2025. In Fahrenheit: 0.11 F (0.01 to 0.21) per decade. The slope is a straight line fitted to 93 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Galesburg
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.06 C (0.01 to 0.11) per decade0.11 F (0.01 to 0.21) per decade1898 to 202593Rise
Mean daily maximum0.01 C (-0.04 to 0.07) per decade0.03 F (-0.08 to 0.13) per decade1898 to 202593Not clearly different from zero
Mean daily minimum0.11 C (0.05 to 0.17) per decade0.2 F (0.1 to 0.3) per decade1898 to 202593Rise

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

1895 to 2026
Yearly extremes at Galesburg: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)44.4 C (111.9 F)193635.6 C (96.1 F)105
Coldest night (TNn)-33.3 C (-27.9 F)1905-23.9 C (-11.0 F)105
Wettest day (Rx1day)195.6 mm (7.7 in)192761.4 mm (2.4 in)116
Wettest five days (Rx5day)245.4 mm (9.7 in)194198.5 mm (3.9 in)116
Longest dry spell (CDD)37 days199921 days116

Hottest day (TXx)

Hottest day (TXx) at Galesburg by year The hottest day of the year at Galesburg, 1895 to 2026. The record is 44.4 C (111.9 F) in 1936, marked on the chart; the median year is 35.6 C (96.1 F). 25303540451900192019401960198020002020Record: 44.4 C (111.9 F) in 1936
The hottest day of the year at Galesburg, 1895 to 2026. The record is 44.4 C (111.9 F) in 1936, marked on the chart; the median year is 35.6 C (96.1 F).
Hottest day (TXx) at Galesburg by year
YearHottest day (TXx)
1895n/a
189628.3 C (82.9 F)
189736.1 C (97.0 F)
189835.6 C (96.1 F)
189937.8 C (100.0 F)
190037.8 C (100.0 F)
190142.2 C (108.0 F)
190233.3 C (91.9 F)
190335.6 C (96.1 F)
190432.8 C (91.0 F)
190535.0 C (95.0 F)
190635.0 C (95.0 F)
190735.6 C (96.1 F)
190833.9 C (93.0 F)
190936.7 C (98.1 F)
1926n/a
1927n/a
1928n/a
1929n/a
1930n/a
1931n/a
1932n/a
1933n/a
1934n/a
1935n/a
193644.4 C (111.9 F)
193736.7 C (98.1 F)
193835.0 C (95.0 F)
193937.2 C (99.0 F)
194039.4 C (102.9 F)
194137.8 C (100.0 F)
194235.0 C (95.0 F)
194334.4 C (93.9 F)
194436.7 C (98.1 F)
194535.6 C (96.1 F)
194636.7 C (98.1 F)
194737.2 C (99.0 F)
194835.6 C (96.1 F)
194936.1 C (97.0 F)
195034.4 C (93.9 F)
195135.6 C (96.1 F)
195236.1 C (97.0 F)
195337.8 C (100.0 F)
195437.2 C (99.0 F)
195537.2 C (99.0 F)
195637.8 C (100.0 F)
195735.6 C (96.1 F)
195834.4 C (93.9 F)
195935.6 C (96.1 F)
196035.0 C (95.0 F)
196133.9 C (93.0 F)
196234.4 C (93.9 F)
196336.7 C (98.1 F)
196436.1 C (97.0 F)
196535.0 C (95.0 F)
196637.8 C (100.0 F)
196733.9 C (93.0 F)
196835.6 C (96.1 F)
196936.1 C (97.0 F)
197036.1 C (97.0 F)
197136.1 C (97.0 F)
197233.9 C (93.0 F)
197334.4 C (93.9 F)
197435.6 C (96.1 F)
197533.3 C (91.9 F)
197636.1 C (97.0 F)
197737.2 C (99.0 F)
197833.9 C (93.0 F)
197933.9 C (93.0 F)
198037.2 C (99.0 F)
198135.0 C (95.0 F)
198234.4 C (93.9 F)
198338.9 C (102.0 F)
198436.7 C (98.1 F)
198535.0 C (95.0 F)
198634.4 C (93.9 F)
198737.2 C (99.0 F)
198838.3 C (100.9 F)
198936.1 C (97.0 F)
199036.1 C (97.0 F)
199135.6 C (96.1 F)
199233.3 C (91.9 F)
199333.3 C (91.9 F)
199435.0 C (95.0 F)
199537.8 C (100.0 F)
199633.9 C (93.0 F)
199734.4 C (93.9 F)
199835.6 C (96.1 F)
199936.1 C (97.0 F)
200036.1 C (97.0 F)
200134.4 C (93.9 F)
200233.9 C (93.0 F)
200335.6 C (96.1 F)
200432.8 C (91.0 F)
200538.3 C (100.9 F)
200636.7 C (98.1 F)
200734.4 C (93.9 F)
200833.9 C (93.0 F)
200934.4 C (93.9 F)
201033.3 C (91.9 F)
201137.2 C (99.0 F)
201238.9 C (102.0 F)
201335.6 C (96.1 F)
201433.9 C (93.0 F)
201533.9 C (93.0 F)
201635.0 C (95.0 F)
201734.4 C (93.9 F)
201835.6 C (96.1 F)
201935.0 C (95.0 F)
202033.3 C (91.9 F)
202133.9 C (93.0 F)
202235.6 C (96.1 F)
202335.6 C (96.1 F)
202435.0 C (95.0 F)
202534.4 C (93.9 F)
202635.0 C (95.0 F)

Coldest night (TNn)

Coldest night (TNn) at Galesburg by year The coldest night of the year at Galesburg, 1895 to 2026. The record is -33.3 C (-27.9 F) in 1905, marked on the chart; the median year is -23.9 C (-11.0 F). -35-30-25-20-151900192019401960198020002020Record: -33.3 C (-27.9 F) in 1905
The coldest night of the year at Galesburg, 1895 to 2026. The record is -33.3 C (-27.9 F) in 1905, marked on the chart; the median year is -23.9 C (-11.0 F).
Coldest night (TNn) at Galesburg by year
YearColdest night (TNn)
1895n/a
1896-16.1 C (3.0 F)
1897-20.6 C (-5.1 F)
1898-23.3 C (-9.9 F)
1899-32.2 C (-26.0 F)
1900-23.3 C (-9.9 F)
1901-27.2 C (-17.0 F)
1902-24.4 C (-11.9 F)
1903-27.8 C (-18.0 F)
1904-28.3 C (-18.9 F)
1905-33.3 C (-27.9 F)
1906-18.3 C (-0.9 F)
1907-23.3 C (-9.9 F)
1908-21.1 C (-6.0 F)
1909-25.6 C (-14.1 F)
1926n/a
1927n/a
1928n/a
1929n/a
1930n/a
1931n/a
1932n/a
1933n/a
1934n/a
1935n/a
1936-17.8 C (0.0 F)
1937-17.2 C (1.0 F)
1938-18.9 C (-2.0 F)
1939-16.1 C (3.0 F)
1940-26.1 C (-15.0 F)
1941-18.9 C (-2.0 F)
1942-23.9 C (-11.0 F)
1943-24.4 C (-11.9 F)
1944-22.8 C (-9.0 F)
1945-23.3 C (-9.9 F)
1946-20.0 C (-4.0 F)
1947-26.1 C (-15.0 F)
1948-19.4 C (-2.9 F)
1949-19.4 C (-2.9 F)
1950-23.9 C (-11.0 F)
1951-26.1 C (-15.0 F)
1952-18.9 C (-2.0 F)
1953-22.2 C (-8.0 F)
1954-21.1 C (-6.0 F)
1955-27.2 C (-17.0 F)
1956-21.7 C (-7.1 F)
1957-28.9 C (-20.0 F)
1958-28.3 C (-18.9 F)
1959-27.8 C (-18.0 F)
1960-25.6 C (-14.1 F)
1961-23.3 C (-9.9 F)
1962-26.1 C (-15.0 F)
1963-30.0 C (-22.0 F)
1964-19.4 C (-2.9 F)
1965-23.9 C (-11.0 F)
1966-28.3 C (-18.9 F)
1967-25.6 C (-14.1 F)
1968-27.2 C (-17.0 F)
1969-23.3 C (-9.9 F)
1970-28.9 C (-20.0 F)
1971-22.2 C (-8.0 F)
1972-26.7 C (-16.1 F)
1973-23.9 C (-11.0 F)
1974-28.3 C (-18.9 F)
1975-24.4 C (-11.9 F)
1976-23.9 C (-11.0 F)
1977-28.9 C (-20.0 F)
1978-23.3 C (-9.9 F)
1979-28.9 C (-20.0 F)
1980-21.7 C (-7.1 F)
1981-24.4 C (-11.9 F)
1982-31.7 C (-25.1 F)
1983-29.4 C (-20.9 F)
1984-27.8 C (-18.0 F)
1985-30.0 C (-22.0 F)
1986-22.8 C (-9.0 F)
1987-20.6 C (-5.1 F)
1988-23.9 C (-11.0 F)
1989-29.4 C (-20.9 F)
1990-20.0 C (-4.0 F)
1991-20.0 C (-4.0 F)
1992-22.2 C (-8.0 F)
1993-21.1 C (-6.0 F)
1994-29.4 C (-20.9 F)
1995-20.6 C (-5.1 F)
1996-31.1 C (-24.0 F)
1997-24.4 C (-11.9 F)
1998-18.9 C (-2.0 F)
1999-27.8 C (-18.0 F)
2000-23.3 C (-9.9 F)
2001-21.1 C (-6.0 F)
2002-21.1 C (-6.0 F)
2003-21.1 C (-6.0 F)
2004-23.9 C (-11.0 F)
2005-24.4 C (-11.9 F)
2006-21.7 C (-7.1 F)
2007-22.8 C (-9.0 F)
2008-27.2 C (-17.0 F)
2009-32.8 C (-27.0 F)
2010-25.0 C (-13.0 F)
2011-26.1 C (-15.0 F)
2012-16.1 C (3.0 F)
2013-22.2 C (-8.0 F)
2014-26.7 C (-16.1 F)
2015-24.4 C (-11.9 F)
2016-23.9 C (-11.0 F)
2017-22.8 C (-9.0 F)
2018-28.9 C (-20.0 F)
2019-29.4 C (-20.9 F)
2020-22.8 C (-9.0 F)
2021-23.9 C (-11.0 F)
2022-23.9 C (-11.0 F)
2023-18.9 C (-2.0 F)
2024-26.7 C (-16.1 F)
2025-25.0 C (-13.0 F)
2026-24.4 C (-11.9 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Galesburg by year The wettest day of the year at Galesburg, 1895 to 2026. The record is 195.6 mm (7.7 in) in 1927, marked on the chart; the median year is 61.4 mm (2.4 in). 0501001502001900192019401960198020002020Record: 195.6 mm (7.7 in) in 1927
The wettest day of the year at Galesburg, 1895 to 2026. The record is 195.6 mm (7.7 in) in 1927, marked on the chart; the median year is 61.4 mm (2.4 in).
Wettest day (Rx1day) at Galesburg by year
YearWettest day (Rx1day)
189563.5 mm (2.5 in)
189676.2 mm (3.0 in)
189763.5 mm (2.5 in)
1898137.2 mm (5.4 in)
189950.8 mm (2.0 in)
190045.7 mm (1.8 in)
190138.1 mm (1.5 in)
190261.0 mm (2.4 in)
190352.6 mm (2.1 in)
190444.5 mm (1.8 in)
190569.9 mm (2.8 in)
190682.0 mm (3.2 in)
190750.8 mm (2.0 in)
190853.3 mm (2.1 in)
190968.6 mm (2.7 in)
192659.4 mm (2.3 in)
1927195.6 mm (7.7 in)
192858.9 mm (2.3 in)
192959.9 mm (2.4 in)
193048.8 mm (1.9 in)
193153.6 mm (2.1 in)
193268.1 mm (2.7 in)
193347.0 mm (1.9 in)
193458.9 mm (2.3 in)
193575.7 mm (3.0 in)
193651.1 mm (2.0 in)
193753.3 mm (2.1 in)
193865.8 mm (2.6 in)
193941.9 mm (1.6 in)
194038.1 mm (1.5 in)
1941105.9 mm (4.2 in)
194267.3 mm (2.6 in)
194349.8 mm (2.0 in)
194464.8 mm (2.6 in)
194572.9 mm (2.9 in)
194657.4 mm (2.3 in)
194797.8 mm (3.9 in)
194878.7 mm (3.1 in)
194954.4 mm (2.1 in)
195098.0 mm (3.9 in)
1951114.3 mm (4.5 in)
195261.2 mm (2.4 in)
195345.5 mm (1.8 in)
1954104.4 mm (4.1 in)
195584.8 mm (3.3 in)
1956106.9 mm (4.2 in)
195743.4 mm (1.7 in)
195869.3 mm (2.7 in)
195942.2 mm (1.7 in)
196057.9 mm (2.3 in)
1961124.5 mm (4.9 in)
196235.6 mm (1.4 in)
196349.0 mm (1.9 in)
196443.9 mm (1.7 in)
196582.8 mm (3.3 in)
196654.6 mm (2.1 in)
196777.5 mm (3.1 in)
196880.0 mm (3.1 in)
196995.0 mm (3.7 in)
1970104.4 mm (4.1 in)
197136.8 mm (1.4 in)
197257.7 mm (2.3 in)
197350.0 mm (2.0 in)
197463.5 mm (2.5 in)
197560.7 mm (2.4 in)
197650.8 mm (2.0 in)
197773.7 mm (2.9 in)
197840.6 mm (1.6 in)
197939.6 mm (1.6 in)
198086.4 mm (3.4 in)
198176.5 mm (3.0 in)
1982149.9 mm (5.9 in)
198375.7 mm (3.0 in)
198452.1 mm (2.1 in)
198599.1 mm (3.9 in)
1986104.6 mm (4.1 in)
198751.3 mm (2.0 in)
198843.4 mm (1.7 in)
198999.6 mm (3.9 in)
199061.5 mm (2.4 in)
199143.9 mm (1.7 in)
199255.1 mm (2.2 in)
1993155.7 mm (6.1 in)
199454.1 mm (2.1 in)
199581.5 mm (3.2 in)
199651.3 mm (2.0 in)
199772.9 mm (2.9 in)
199851.8 mm (2.0 in)
199950.3 mm (2.0 in)
200045.5 mm (1.8 in)
200141.1 mm (1.6 in)
200271.4 mm (2.8 in)
200383.3 mm (3.3 in)
200451.1 mm (2.0 in)
200538.9 mm (1.5 in)
200647.2 mm (1.9 in)
200756.1 mm (2.2 in)
200863.5 mm (2.5 in)
200991.9 mm (3.6 in)
201082.3 mm (3.2 in)
201156.4 mm (2.2 in)
201259.4 mm (2.3 in)
2013105.7 mm (4.2 in)
201496.0 mm (3.8 in)
201577.2 mm (3.0 in)
201681.5 mm (3.2 in)
201774.2 mm (2.9 in)
201888.4 mm (3.5 in)
2019109.2 mm (4.3 in)
202063.5 mm (2.5 in)
202163.5 mm (2.5 in)
202274.2 mm (2.9 in)
202355.4 mm (2.2 in)
202438.4 mm (1.5 in)
202550.0 mm (2.0 in)
202662.0 mm (2.4 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Galesburg by year The wettest five days of the year at Galesburg, 1895 to 2026. The record is 245.4 mm (9.7 in) in 1941, marked on the chart; the median year is 98.5 mm (3.9 in). 01002003001900192019401960198020002020Record: 245.4 mm (9.7 in) in 1941
The wettest five days of the year at Galesburg, 1895 to 2026. The record is 245.4 mm (9.7 in) in 1941, marked on the chart; the median year is 98.5 mm (3.9 in).
Wettest five days (Rx5day) at Galesburg by year
YearWettest five days (Rx5day)
1895110.9 mm (4.4 in)
189679.2 mm (3.1 in)
1897110.3 mm (4.3 in)
1898146.1 mm (5.8 in)
189955.6 mm (2.2 in)
1900106.8 mm (4.2 in)
190158.7 mm (2.3 in)
1902107.2 mm (4.2 in)
190351.4 mm (2.0 in)
190462.5 mm (2.5 in)
190573.7 mm (2.9 in)
190656.7 mm (2.2 in)
190783.8 mm (3.3 in)
190889.7 mm (3.5 in)
1909172.8 mm (6.8 in)
192681.8 mm (3.2 in)
1927195.6 mm (7.7 in)
192880.8 mm (3.2 in)
192984.6 mm (3.3 in)
193049.8 mm (2.0 in)
193163.7 mm (2.5 in)
1932139.5 mm (5.5 in)
193375.2 mm (3.0 in)
1934112.5 mm (4.4 in)
1935115.6 mm (4.6 in)
193688.9 mm (3.5 in)
193767.8 mm (2.7 in)
1938100.4 mm (4.0 in)
193963.5 mm (2.5 in)
194043.2 mm (1.7 in)
1941245.4 mm (9.7 in)
194282.5 mm (3.2 in)
194372.9 mm (2.9 in)
1944103.1 mm (4.1 in)
194598.1 mm (3.9 in)
194664.0 mm (2.5 in)
194766.8 mm (2.6 in)
194893.3 mm (3.7 in)
194984.6 mm (3.3 in)
1950145.3 mm (5.7 in)
1951115.1 mm (4.5 in)
1952107.9 mm (4.2 in)
195363.4 mm (2.5 in)
1954106.7 mm (4.2 in)
1955100.5 mm (4.0 in)
1956198.1 mm (7.8 in)
195772.4 mm (2.9 in)
1958146.7 mm (5.8 in)
1959123.0 mm (4.8 in)
1960101.6 mm (4.0 in)
1961161.9 mm (6.4 in)
196273.9 mm (2.9 in)
196354.9 mm (2.2 in)
196475.5 mm (3.0 in)
196596.8 mm (3.8 in)
196666.3 mm (2.6 in)
196785.9 mm (3.4 in)
196880.0 mm (3.1 in)
1969156.7 mm (6.2 in)
1970122.9 mm (4.8 in)
197158.9 mm (2.3 in)
197296.5 mm (3.8 in)
197377.0 mm (3.0 in)
1974138.9 mm (5.5 in)
197569.6 mm (2.7 in)
1976102.7 mm (4.0 in)
1977168.7 mm (6.6 in)
197866.2 mm (2.6 in)
197967.8 mm (2.7 in)
1980172.2 mm (6.8 in)
1981113.4 mm (4.5 in)
1982194.1 mm (7.6 in)
198398.9 mm (3.9 in)
198482.3 mm (3.2 in)
1985103.7 mm (4.1 in)
1986120.2 mm (4.7 in)
1987101.6 mm (4.0 in)
198859.9 mm (2.4 in)
1989106.2 mm (4.2 in)
1990109.5 mm (4.3 in)
199176.0 mm (3.0 in)
199286.1 mm (3.4 in)
1993229.9 mm (9.1 in)
199467.5 mm (2.7 in)
1995100.3 mm (3.9 in)
199688.1 mm (3.5 in)
1997113.4 mm (4.5 in)
199880.3 mm (3.2 in)
199984.8 mm (3.3 in)
200094.7 mm (3.7 in)
200157.4 mm (2.3 in)
2002105.7 mm (4.2 in)
200389.9 mm (3.5 in)
200490.1 mm (3.5 in)
200561.3 mm (2.4 in)
2006101.7 mm (4.0 in)
2007101.8 mm (4.0 in)
2008130.1 mm (5.1 in)
2009156.1 mm (6.1 in)
2010125.0 mm (4.9 in)
201192.5 mm (3.6 in)
201282.0 mm (3.2 in)
2013173.0 mm (6.8 in)
2014102.9 mm (4.1 in)
201582.6 mm (3.3 in)
2016109.5 mm (4.3 in)
2017127.5 mm (5.0 in)
2018165.9 mm (6.5 in)
2019131.3 mm (5.2 in)
2020130.8 mm (5.1 in)
202199.3 mm (3.9 in)
2022109.3 mm (4.3 in)
2023116.1 mm (4.6 in)
202469.8 mm (2.7 in)
2025107.9 mm (4.2 in)
2026189.0 mm (7.4 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Galesburg by year The longest dry spell of the year at Galesburg, 1895 to 2026. The record is 37 days in 1999, marked on the chart; the median year is 21 days. 102030401900192019401960198020002020Record: 37 days in 1999
The longest dry spell of the year at Galesburg, 1895 to 2026. The record is 37 days in 1999, marked on the chart; the median year is 21 days.
Longest dry spell (CDD) at Galesburg by year
YearLongest dry spell (CDD)
189525 days
189620 days
189725 days
189823 days
189918 days
190020 days
190123 days
190226 days
190317 days
190421 days
190517 days
190621 days
190730 days
190820 days
190923 days
192613 days
192715 days
192818 days
192916 days
193029 days
193119 days
193218 days
193327 days
193421 days
193523 days
193622 days
193719 days
193824 days
193925 days
194014 days
194124 days
194228 days
194327 days
194428 days
194526 days
194622 days
194728 days
194832 days
194921 days
195029 days
195116 days
195233 days
195323 days
195423 days
195518 days
195636 days
195722 days
195828 days
195934 days
196025 days
196119 days
196217 days
196317 days
196436 days
196520 days
196626 days
196725 days
196830 days
196918 days
197015 days
197124 days
197213 days
197314 days
197420 days
197514 days
197626 days
197720 days
197816 days
197926 days
198027 days
198123 days
198218 days
198325 days
198417 days
198517 days
198622 days
198732 days
198824 days
198914 days
199016 days
199115 days
199216 days
199321 days
199416 days
199521 days
199619 days
199718 days
199822 days
199937 days
200019 days
200124 days
200227 days
200316 days
200419 days
200520 days
200616 days
200722 days
200815 days
200916 days
201020 days
201117 days
201217 days
201335 days
201419 days
201534 days
201619 days
201720 days
201815 days
201918 days
202019 days
202126 days
202223 days
202328 days
202424 days
202519 days
202637 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

93 years with a frost

Across 93 years with a frost, the median last spring frost at Galesburg falls on 20 April and the median first autumn frost on 16 October, which leaves a median of 179 days between them.

In 1995 to 2025 the median growing season was 183 days. That is 1 day more than in 1898 to 1960.

Fitted over all years, the growing season changes by +1.1 days per decade at this station.

Frost dates and growing season at Galesburg
MeasureMedian, all yearsEarliest period (1898 to 1960)Recent period (1995 to 2025)Recent against earliestFitted trend
Last spring frost20 April21 April19 April2 days earlier-0.7 days per decade
First autumn frost16 October18 October19 October1 day later+0.4 days per decade
Growing days179 days182 days183 days1 day more+1.1 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

100 years, 1896 to 2025

A day with at least 63.8 mm (2.5 in) of rain is expected about once in 2 years. A day with at least 159.8 mm (6.3 in) of rain is expected about once in 100 years.

Rainfall return levels at Galesburg: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years63.8 mm (2.5 in)
5 years85.7 mm (3.4 in)
10 years101.6 mm (4.0 in)
25 years123.4 mm (4.9 in)
50 years141.0 mm (5.6 in)
100 years159.8 mm (6.3 in)

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 100 years of values from 1896 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: 155.7 mm (6.1 in) in 1993; 149.9 mm (5.9 in) in 1982; 137.2 mm (5.4 in) in 1898.

Station Changes

2 suspected

2 changes were suspected in the annual mean temperature of Galesburg, at 2002 and 2008. Each is measured against neighbouring stations.

  • Relative to 5 neighbouring stations, the station's annual mean temperature from 2002 ran 0.4 C (0.7 F) higher than in the years before (possible change).
  • Relative to 5 neighbouring stations, the station's annual mean temperature from 2008 ran 0.6 C (1.1 F) lower than in the years before (likely change).
Suspected changes in the annual mean temperature at Galesburg, against neighbouring stations
YearShift (C)Shift (F)StrengthNeighbours
2002+0.4+0.7possible5
2008-0.6-1.1likely5

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, Galesburg had a mean temperature of 10.4 C (50.7 F) and 979.2 mm (38.6 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Rantoul (United States, 201 km away), Chicago Midway AP 3SW (United States, 235 km away) and Plymouth Pwr Substn (United States, 343 km away).

Climate twins of Galesburg: 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
RantoulUnited States201 km (125 mi)10.7 C (51.2 F)920.8 mm (36.3 in)0.73
Chicago Midway AP 3SWUnited States235 km (146 mi)10.3 C (50.6 F)948.6 mm (37.3 in)0.74
Plymouth Pwr SubstnUnited States343 km (213 mi)10.1 C (50.3 F)957.0 mm (37.7 in)0.74

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 Galesburg standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Galesburg 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2026-10-15).