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Built 2026-10-19 (19 October 2026)

Days with 10 mm (0.39 in) or more of precipitation in Chicago

Chicago has had days with 10 mm (0.39 in) or more of precipitation in 68 years, most in 2019 with 41. Days per year, season span, streaks and every date.

Key Facts for Chicago

  • Chicago has had days with 10 mm (0.39 in) or more of precipitation in 68 years, 1,966 days in all.
  • The most in one year was 41 days in 2019.
  • In 2026, the latest year on file, there were 28 such days.
  • The earliest first date in a year was 1 January 1965.
  • The latest last date in a year was 31 December 1984.
  • The longest run inside a single year was 4 days in 1961.
  • 2 years with under 90 percent of days observed are left out of these rankings.

Days per Year

68 years, 1,966 days
Days with 10 mm (0.39 in) or more of precipitation per year in Chicago Days per year in Chicago with 10 mm (0.39 in) or more of precipitation. The line is the decade average. The most was 41 in 2019. Grey bars are years with under 90 percent of days observed, left out of rankings. 02040601959: 281960: 201961: 301962: 151963: 171964: 231965: 381966: 281967: 311968: 261969: 291970: 391971: 221972: 351973: 271974: 341975: 311976: 231977: 251978: 251979: 311980: 341981: 321982: 351983: 361984: 281985: 351986: 261987: 301988: 271989: 221990: 311991: 311992: 251993: 331994: 231995: 251996: 221997: 251998: 281999: 322000: 252001: 382002: 212003: 272004: 262005: 212006: 372007: 252008: 372009: 352010: 292011: 352012: 212013: 352014: 322015: 362016: 362017: 342018: 362019: 412020: 272021: 222022: 252023: 242024: 342025: 222026: 281959196919791989199920092019
Days per year in Chicago with 10 mm (0.39 in) or more of precipitation. The line is the decade average. The most was 41 in 2019. Grey bars are years with under 90 percent of days observed, left out of rankings.
Days with 10 mm (0.39 in) or more of precipitation per year in Chicago
YearDaysDecade average
19592828
19602025.7
19613025.7
19621525.7
19631725.7
19642325.7
19653825.7
19662825.7
19673125.7
19682625.7
19692925.7
19703929.2
19712229.2
19723529.2
19732729.2
19743429.2
19753129.2
19762329.2
19772529.2
19782529.2
19793129.2
19803430.5
19813230.5
19823530.5
19833630.5
19842830.5
19853530.5
19862630.5
19873030.5
19882730.5
19892230.5
19903127.5
19913127.5
19922527.5
19933327.5
19942327.5
19952527.5
19962227.5
19972527.5
19982827.5
19993227.5
20002529.2
20013829.2
20022129.2
20032729.2
20042629.2
20052129.2
20063729.2
20072529.2
20083729.2
20093529.2
20102933.5
20113533.5
20122133.5
20133533.5
20143233.5
20153633.5
20163633.5
20173433.5
20183633.5
20194133.5
20202726
20212226
20222526
20232426
20243426
20252226
20262826

Season Span

earliest 1 January, latest 31 December
First to last qualifying date each year in Chicago For each year, a bar from the first to the last day in Chicago meeting 10 mm (0.39 in). Long bars mean a long season. 1959: 20 January 1959 to 27 December 19591960: 12 January 1960 to 31 October 19601961: 3 February 1961 to 23 December 19611962: 6 January 1962 to 20 October 19621963: 17 April 1963 to 22 November 19631964: 4 March 1964 to 28 November 19641965: 1 January 1965 to 24 December 19651966: 12 January 1966 to 7 December 19661967: 26 January 1967 to 21 December 19671968: 27 January 1968 to 28 December 19681969: 24 March 1969 to 7 December 19691970: 19 March 1970 to 11 December 19701971: 3 January 1971 to 30 December 19711972: 12 March 1972 to 30 December 19721973: 3 January 1973 to 13 December 19731974: 20 January 1974 to 15 December 19741975: 10 January 1975 to 14 December 19751976: 21 February 1976 to 26 November 19761977: 4 March 1977 to 20 December 19771978: 26 January 1978 to 31 December 19781979: 13 January 1979 to 24 December 19791980: 17 March 1980 to 8 December 19801981: 10 February 1981 to 23 November 19811982: 3 January 1982 to 27 December 19821983: 2 February 1983 to 14 December 19831984: 12 February 1984 to 31 December 19841985: 1 January 1985 to 1 December 19851986: 4 February 1986 to 7 December 19861987: 9 January 1987 to 28 December 19871988: 17 January 1988 to 27 December 19881989: 28 March 1989 to 15 November 19891990: 25 January 1990 to 29 December 19901991: 11 January 1991 to 12 December 19911992: 15 February 1992 to 30 December 19921993: 4 January 1993 to 18 December 19931994: 27 January 1994 to 6 December 19941995: 13 January 1995 to 10 November 19951996: 18 January 1996 to 11 December 19961997: 4 January 1997 to 24 December 19971998: 3 January 1998 to 6 December 19981999: 2 January 1999 to 5 December 19992000: 18 February 2000 to 13 December 20002001: 29 January 2001 to 12 December 20012002: 31 January 2002 to 18 December 20022003: 4 March 2003 to 10 December 20032004: 4 January 2004 to 7 December 20042005: 12 January 2005 to 8 December 20052006: 13 January 2006 to 22 December 20062007: 4 January 2007 to 11 December 20072008: 8 January 2008 to 27 December 20082009: 11 February 2009 to 25 December 20092010: 24 January 2010 to 31 December 20102011: 1 February 2011 to 30 December 20112012: 20 January 2012 to 20 December 20122013: 10 January 2013 to 16 November 20132014: 5 January 2014 to 24 November 20142015: 3 January 2015 to 28 December 20152016: 2 February 2016 to 11 December 20162017: 16 January 2017 to 18 November 20172018: 22 January 2018 to 31 December 20182019: 7 January 2019 to 29 December 20192020: 10 January 2020 to 29 December 20202021: 26 January 2021 to 10 December 20212022: 16 February 2022 to 14 December 20222023: 3 January 2023 to 22 December 20232024: 9 January 2024 to 31 December 20242025: 30 January 2025 to 28 December 20252026: 8 January 2026 to 1 October 202619591968197719861995200420132022JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day in Chicago meeting 10 mm (0.39 in). Long bars mean a long season.
First to last qualifying date each year in Chicago
YearFirst dateLast date
19591959-01-201959-12-27
19601960-01-121960-10-31
19611961-02-031961-12-23
19621962-01-061962-10-20
19631963-04-171963-11-22
19641964-03-041964-11-28
19651965-01-011965-12-24
19661966-01-121966-12-07
19671967-01-261967-12-21
19681968-01-271968-12-28
19691969-03-241969-12-07
19701970-03-191970-12-11
19711971-01-031971-12-30
19721972-03-121972-12-30
19731973-01-031973-12-13
19741974-01-201974-12-15
19751975-01-101975-12-14
19761976-02-211976-11-26
19771977-03-041977-12-20
19781978-01-261978-12-31
19791979-01-131979-12-24
19801980-03-171980-12-08
19811981-02-101981-11-23
19821982-01-031982-12-27
19831983-02-021983-12-14
19841984-02-121984-12-31
19851985-01-011985-12-01
19861986-02-041986-12-07
19871987-01-091987-12-28
19881988-01-171988-12-27
19891989-03-281989-11-15
19901990-01-251990-12-29
19911991-01-111991-12-12
19921992-02-151992-12-30
19931993-01-041993-12-18
19941994-01-271994-12-06
19951995-01-131995-11-10
19961996-01-181996-12-11
19971997-01-041997-12-24
19981998-01-031998-12-06
19991999-01-021999-12-05
20002000-02-182000-12-13
20012001-01-292001-12-12
20022002-01-312002-12-18
20032003-03-042003-12-10
20042004-01-042004-12-07
20052005-01-122005-12-08
20062006-01-132006-12-22
20072007-01-042007-12-11
20082008-01-082008-12-27
20092009-02-112009-12-25
20102010-01-242010-12-31
20112011-02-012011-12-30
20122012-01-202012-12-20
20132013-01-102013-11-16
20142014-01-052014-11-24
20152015-01-032015-12-28
20162016-02-022016-12-11
20172017-01-162017-11-18
20182018-01-222018-12-31
20192019-01-072019-12-29
20202020-01-102020-12-29
20212021-01-262021-12-10
20222022-02-162022-12-14
20232023-01-032023-12-22
20242024-01-092024-12-31
20252025-01-302025-12-28
20262026-01-082026-10-01

Every Year

Days with 10 mm (0.39 in) or more of precipitation per year in Chicago
YearDaysFirst dateLast dateLongest streak in yearCoverage
2026288 January 20261 October 20262 daysIncomplete, not ranked
20252230 January 202528 December 20253 daysComplete
2024349 January 202431 December 20243 daysComplete
2023243 January 202322 December 20232 daysComplete
20222516 February 202214 December 20222 daysComplete
20212226 January 202110 December 20213 daysComplete
20202710 January 202029 December 20204 daysComplete
2019417 January 201929 December 20194 daysComplete
20183622 January 201831 December 20182 daysComplete
20173416 January 201718 November 20174 daysComplete
2016362 February 201611 December 20162 daysComplete
2015363 January 201528 December 20153 daysComplete
2014325 January 201424 November 20142 daysComplete
20133510 January 201316 November 20133 daysComplete
20122120 January 201220 December 20122 daysComplete
2011351 February 201130 December 20113 daysComplete
20102924 January 201031 December 20102 daysComplete
20093511 February 200925 December 20093 daysComplete
2008378 January 200827 December 20082 daysComplete
2007254 January 200711 December 20072 daysComplete
20063713 January 200622 December 20063 daysComplete
20052112 January 20058 December 20052 daysComplete
2004264 January 20047 December 20043 daysComplete
2003274 March 200310 December 20033 daysComplete
20022131 January 200218 December 20022 daysComplete
20013829 January 200112 December 20013 daysComplete
20002518 February 200013 December 20002 daysComplete
1999322 January 19995 December 19993 daysComplete
1998283 January 19986 December 19983 daysComplete
1997254 January 199724 December 19973 daysComplete
19962218 January 199611 December 19962 daysComplete
19952513 January 199510 November 19953 daysComplete
19942327 January 19946 December 19942 daysComplete
1993334 January 199318 December 19933 daysComplete
19922515 February 199230 December 19923 daysComplete
19913111 January 199112 December 19912 daysComplete
19903125 January 199029 December 19904 daysComplete
19892228 March 198915 November 19892 daysComplete
19882717 January 198827 December 19882 daysComplete
1987309 January 198728 December 19874 daysComplete
1986264 February 19867 December 19862 daysComplete
1985351 January 19851 December 19852 daysComplete
19842812 February 198431 December 19842 daysComplete
1983362 February 198314 December 19832 daysComplete
1982353 January 198227 December 19822 daysComplete
19813210 February 198123 November 19812 daysComplete
19803417 March 19808 December 19802 daysComplete
19793113 January 197924 December 19792 daysComplete
19782526 January 197831 December 19783 daysComplete
1977254 March 197720 December 19772 daysComplete
19762321 February 197626 November 19762 daysComplete
19753110 January 197514 December 19752 daysComplete
19743420 January 197415 December 19742 daysComplete
1973273 January 197313 December 19732 daysComplete
19723512 March 197230 December 19722 daysComplete
1971223 January 197130 December 19712 daysComplete
19703919 March 197011 December 19704 daysComplete
19692924 March 19697 December 19693 daysComplete
19682627 January 196828 December 19683 daysComplete
19673126 January 196721 December 19672 daysComplete
19662812 January 19667 December 19663 daysComplete
1965381 January 196524 December 19652 daysComplete
1964234 March 196428 November 19642 daysComplete
19631717 April 196322 November 19632 daysComplete
1962156 January 196220 October 19621 daysComplete
1961303 February 196123 December 19614 daysComplete
19602012 January 196031 October 19602 daysComplete
19592820 January 195927 December 19593 daysComplete
Decade averages for Days with 10 mm (0.39 in) or more of precipitation in Chicago
DecadeAverage days per yearYears counted
1950s28.01
1960s25.710
1970s29.210
1980s30.510
1990s27.510
2000s29.210
2010s33.510
2020s25.76

Compare with your own threshold in the threshold explorer. Fahrenheit thresholds are converted to tenths of a degree Celsius once, rounding half up.

Download the Data

  • Data for Days with 10 mm (0.39 in) or more of precipitation in Chicago, 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 2026-10-17 (17 October 2026). Threshold counts are computed by this site from the threaded city record.

Data as of . Last revised (2026-10-17).