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Built 2026-10-19 (19 October 2026)

Days at or above 90 F (32.2 C) in Chicago

Chicago has had days with a maximum temperature at or above 90 F (32.2 C) in 68 years, most in 1988 with 47. Days per year, season span, streaks and every date.

Key Facts for Chicago

  • Chicago has had days with a maximum temperature at or above 90 F (32.2 C) in 68 years, 1,179 days in all.
  • The most in one year was 47 days in 1988.
  • In 2026, the latest year on file, there were 16 such days.
  • The earliest first date in a year was 22 April 1980.
  • The latest last date in a year was 6 October 1963.
  • The longest run inside a single year was 10 days in 1987.
  • 2 years with under 90 percent of days observed are left out of these rankings.

Days per Year

68 years, 1,179 days
Days at or above 90 F (32.2 C) per year in Chicago Days per year in Chicago with a maximum temperature at or above 90 F (32.2 C). The line is the decade average. The most was 47 in 1988. Grey bars are years with under 90 percent of days observed, left out of rankings. 02040601959: 301960: 151961: 91962: 181963: 131964: 261965: 51966: 171967: 31968: 241969: 71970: 111971: 251972: 121973: 131974: 91975: 211976: 161977: 311978: 81979: 151980: 271981: 61982: 81983: 421984: 201985: 121986: 131987: 331988: 471989: 81990: 101991: 301992: 61993: 111994: 171995: 301996: 101997: 131998: 151999: 222000: 42001: 182002: 232003: 102004: 32005: 262006: 152007: 192008: 62009: 42010: 212011: 222012: 462013: 132014: 32015: 102016: 162017: 162018: 262019: 142020: 312021: 222022: 162023: 212024: 232025: 272026: 161959196919791989199920092019
Days per year in Chicago with a maximum temperature at or above 90 F (32.2 C). The line is the decade average. The most was 47 in 1988. Grey bars are years with under 90 percent of days observed, left out of rankings.
Days at or above 90 F (32.2 C) per year in Chicago
YearDaysDecade average
19593030
19601513.7
1961913.7
19621813.7
19631313.7
19642613.7
1965513.7
19661713.7
1967313.7
19682413.7
1969713.7
19701116.1
19712516.1
19721216.1
19731316.1
1974916.1
19752116.1
19761616.1
19773116.1
1978816.1
19791516.1
19802721.6
1981621.6
1982821.6
19834221.6
19842021.6
19851221.6
19861321.6
19873321.6
19884721.6
1989821.6
19901016.4
19913016.4
1992616.4
19931116.4
19941716.4
19953016.4
19961016.4
19971316.4
19981516.4
19992216.4
2000412.8
20011812.8
20022312.8
20031012.8
2004312.8
20052612.8
20061512.8
20071912.8
2008612.8
2009412.8
20102118.7
20112218.7
20124618.7
20131318.7
2014318.7
20151018.7
20161618.7
20171618.7
20182618.7
20191418.7
20203122.3
20212222.3
20221622.3
20232122.3
20242322.3
20252722.3
20261622.3

Season Span

earliest 22 April, latest 6 October
First to last qualifying date each year in Chicago For each year, a bar from the first to the last day in Chicago meeting 90 F (32.2 C). Long bars mean a long season. 1959: 4 May 1959 to 9 September 19591960: 12 July 1960 to 8 September 19601961: 11 June 1961 to 31 August 19611962: 16 May 1962 to 13 September 19621963: 8 May 1963 to 6 October 19631964: 8 June 1964 to 10 September 19641965: 27 June 1965 to 15 August 19651966: 25 June 1966 to 2 September 19661967: 26 May 1967 to 15 June 19671968: 6 June 1968 to 24 August 19681969: 28 May 1969 to 30 August 19691970: 29 June 1970 to 30 August 19701971: 4 June 1971 to 1 October 19711972: 3 June 1972 to 22 August 19721973: 10 June 1973 to 3 September 19731974: 20 June 1974 to 19 July 19741975: 19 May 1975 to 24 August 19751976: 9 June 1976 to 8 September 19761977: 18 May 1977 to 31 August 19771978: 20 July 1978 to 19 September 19781979: 8 May 1979 to 9 August 19791980: 22 April 1980 to 20 September 19801981: 29 June 1981 to 18 July 19811982: 14 May 1982 to 3 August 19821983: 11 June 1983 to 10 September 19831984: 18 May 1984 to 7 September 19841985: 8 June 1985 to 8 September 19851986: 19 June 1986 to 22 September 19861987: 8 June 1987 to 16 August 19871988: 30 May 1988 to 17 September 19881989: 22 June 1989 to 3 August 19891990: 13 June 1990 to 6 September 19901991: 28 May 1991 to 15 September 19911992: 13 June 1992 to 10 August 19921993: 17 June 1993 to 30 August 19931994: 30 May 1994 to 15 September 19941995: 7 June 1995 to 5 September 19951996: 18 May 1996 to 21 August 19961997: 23 June 1997 to 16 August 19971998: 18 May 1998 to 26 September 19981999: 6 June 1999 to 5 September 19992000: 15 August 2000 to 2 September 20002001: 13 June 2001 to 9 August 20012002: 1 June 2002 to 9 September 20022003: 18 June 2003 to 28 August 20032004: 8 June 2004 to 3 August 20042005: 7 June 2005 to 13 September 20052006: 28 May 2006 to 2 August 20062007: 14 May 2007 to 24 September 20072008: 12 June 2008 to 2 September 20082009: 23 June 2009 to 9 August 20092010: 24 May 2010 to 31 August 20102011: 10 May 2011 to 2 September 20112012: 19 May 2012 to 4 September 20122013: 14 May 2013 to 11 September 20132014: 1 June 2014 to 22 July 20142015: 10 June 2015 to 6 September 20152016: 10 June 2016 to 6 September 20162017: 4 June 2017 to 26 September 20172018: 26 May 2018 to 20 September 20182019: 28 June 2019 to 10 September 20192020: 24 May 2020 to 28 August 20202021: 24 May 2021 to 28 August 20212022: 11 May 2022 to 6 August 20222023: 30 May 2023 to 5 September 20232024: 12 June 2024 to 21 September 20242025: 15 May 2025 to 16 August 20252026: 10 June 2026 to 4 September 202619591968197719861995200420132022JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day in Chicago meeting 90 F (32.2 C). Long bars mean a long season.
First to last qualifying date each year in Chicago
YearFirst dateLast date
19591959-05-041959-09-09
19601960-07-121960-09-08
19611961-06-111961-08-31
19621962-05-161962-09-13
19631963-05-081963-10-06
19641964-06-081964-09-10
19651965-06-271965-08-15
19661966-06-251966-09-02
19671967-05-261967-06-15
19681968-06-061968-08-24
19691969-05-281969-08-30
19701970-06-291970-08-30
19711971-06-041971-10-01
19721972-06-031972-08-22
19731973-06-101973-09-03
19741974-06-201974-07-19
19751975-05-191975-08-24
19761976-06-091976-09-08
19771977-05-181977-08-31
19781978-07-201978-09-19
19791979-05-081979-08-09
19801980-04-221980-09-20
19811981-06-291981-07-18
19821982-05-141982-08-03
19831983-06-111983-09-10
19841984-05-181984-09-07
19851985-06-081985-09-08
19861986-06-191986-09-22
19871987-06-081987-08-16
19881988-05-301988-09-17
19891989-06-221989-08-03
19901990-06-131990-09-06
19911991-05-281991-09-15
19921992-06-131992-08-10
19931993-06-171993-08-30
19941994-05-301994-09-15
19951995-06-071995-09-05
19961996-05-181996-08-21
19971997-06-231997-08-16
19981998-05-181998-09-26
19991999-06-061999-09-05
20002000-08-152000-09-02
20012001-06-132001-08-09
20022002-06-012002-09-09
20032003-06-182003-08-28
20042004-06-082004-08-03
20052005-06-072005-09-13
20062006-05-282006-08-02
20072007-05-142007-09-24
20082008-06-122008-09-02
20092009-06-232009-08-09
20102010-05-242010-08-31
20112011-05-102011-09-02
20122012-05-192012-09-04
20132013-05-142013-09-11
20142014-06-012014-07-22
20152015-06-102015-09-06
20162016-06-102016-09-06
20172017-06-042017-09-26
20182018-05-262018-09-20
20192019-06-282019-09-10
20202020-05-242020-08-28
20212021-05-242021-08-28
20222022-05-112022-08-06
20232023-05-302023-09-05
20242024-06-122024-09-21
20252025-05-152025-08-16
20262026-06-102026-09-04

Every Year

Days at or above 90 F (32.2 C) per year in Chicago
YearDaysFirst dateLast dateLongest streak in yearCoverage
20261610 June 20264 September 20266 daysIncomplete, not ranked
20252715 May 202516 August 20254 daysComplete
20242312 June 202421 September 20244 daysComplete
20232130 May 20235 September 20234 daysComplete
20221611 May 20226 August 20223 daysComplete
20212224 May 202128 August 20215 daysComplete
20203124 May 202028 August 20206 daysComplete
20191428 June 201910 September 20193 daysComplete
20182626 May 201820 September 20183 daysComplete
2017164 June 201726 September 20177 daysComplete
20161610 June 20166 September 20164 daysComplete
20151010 June 20156 September 20152 daysComplete
201431 June 201422 July 20141 daysComplete
20131314 May 201311 September 20134 daysComplete
20124619 May 20124 September 20128 daysComplete
20112210 May 20112 September 20115 daysComplete
20102124 May 201031 August 20105 daysComplete
2009423 June 20099 August 20093 daysComplete
2008612 June 20082 September 20083 daysComplete
20071914 May 200724 September 20074 daysComplete
20061528 May 20062 August 20066 daysComplete
2005267 June 200513 September 20058 daysComplete
200438 June 20043 August 20041 daysComplete
20031018 June 200328 August 20032 daysComplete
2002231 June 20029 September 20025 daysComplete
20011813 June 20019 August 20015 daysComplete
2000415 August 20002 September 20003 daysComplete
1999226 June 19995 September 19995 daysComplete
19981518 May 199826 September 19983 daysComplete
19971323 June 199716 August 19975 daysComplete
19961018 May 199621 August 19963 daysComplete
1995307 June 19955 September 19955 daysComplete
19941730 May 199415 September 19946 daysComplete
19931117 June 199330 August 19933 daysComplete
1992613 June 199210 August 19922 daysComplete
19913028 May 199115 September 19915 daysComplete
19901013 June 19906 September 19902 daysComplete
1989822 June 19893 August 19892 daysComplete
19884730 May 198817 September 19889 daysComplete
1987338 June 198716 August 198710 daysComplete
19861319 June 198622 September 19865 daysComplete
1985128 June 19858 September 19854 daysComplete
19842018 May 19847 September 19844 daysComplete
19834211 June 198310 September 19839 daysComplete
1982814 May 19823 August 19822 daysComplete
1981629 June 198118 July 19812 daysComplete
19802722 April 198020 September 19809 daysComplete
1979158 May 19799 August 19794 daysComplete
1978820 July 197819 September 19785 daysComplete
19773118 May 197731 August 19778 daysComplete
1976169 June 19768 September 19764 daysComplete
19752119 May 197524 August 19756 daysComplete
1974920 June 197419 July 19743 daysComplete
19731310 June 19733 September 19734 daysComplete
1972123 June 197222 August 19723 daysComplete
1971254 June 19711 October 19714 daysComplete
19701129 June 197030 August 19704 daysComplete
1969728 May 196930 August 19692 daysComplete
1968246 June 196824 August 19686 daysComplete
1967326 May 196715 June 19671 daysComplete
19661725 June 19662 September 19664 daysComplete
1965527 June 196515 August 19652 daysComplete
1964268 June 196410 September 19645 daysComplete
1963138 May 19636 October 19633 daysComplete
19621816 May 196213 September 19625 daysComplete
1961911 June 196131 August 19613 daysComplete
19601512 July 19608 September 19603 daysComplete
1959304 May 19599 September 19598 daysComplete
Decade averages for Days at or above 90 F (32.2 C) in Chicago
DecadeAverage days per yearYears counted
1950s30.01
1960s13.710
1970s16.110
1980s21.610
1990s16.410
2000s12.810
2010s18.710
2020s23.36

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 at or above 90 F (32.2 C) 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).