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Built 2026-10-14 (14 October 2026)

Chicago Weather Records and Extremes

Record highs and lows for Chicago, threaded from 1 station; the hottest day was 40.0 C (104.0 F) on 20 June 1988, with the station behind every year.

Key Facts for Chicago

  • The highest maximum temperature on record in Chicago is 40.0 C (104.0 F), set on 20 June 1988.
  • The lowest minimum temperature on record in Chicago is -32.8 C (-27.0 F), set on 20 January 1985.
  • The lowest maximum temperature on record in Chicago is -23.9 C (-11.0 F), set on 24 December 1983.
  • The highest minimum temperature on record in Chicago is 28.3 C (82.9 F), set on 14 July 1995.
  • The Chicago record is threaded from 1 station and runs from 1958 to 2026, 69 years.
  • 1,464 daily records at Chicago still stand.
  • 1963 holds the most standing records at Chicago: 57.

Stations Behind the Chicago Record

69 years of record
Stations threaded into the Chicago record
StationFromToNotes
Chicago Ohare Intl AP19582026Chicago O'Hare International Airport.

Caveats

  • O'Hare opened as the official station in 1958 and sits about 25 km from the lakefront, so its extremes differ from downtown.

All-Time Extremes

All-time temperature extremes at Chicago
ExtremeValueDateStation
Highest maximum40.0 C (104.0 F)20 June 1988Chicago Ohare Intl AP
Lowest maximum-23.9 C (-11.0 F)24 December 1983Chicago Ohare Intl AP
Highest minimum28.3 C (82.9 F)14 July 1995Chicago Ohare Intl AP
Lowest minimum-32.8 C (-27.0 F)20 January 1985Chicago Ohare Intl AP

Daily Record Envelope and 2026

8 days at or beyond a record
Daily record high and record low at Chicago, with 2026 drawn through them The band shows the record high and record low for each calendar day at Chicago. The lines show the 2026 daily maximum and minimum. 8 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -40-2002040 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Chicago. The lines show the 2026 daily maximum and minimum. 8 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Chicago, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan18.3 C (64.9 F)-32.8 C (-27.0 F)15.6 C (60.1 F)-23.9 C (-11.0 F)
Feb23.3 C (73.9 F)-28.3 C (-18.9 F)18.3 C (64.9 F)-13.9 C (7.0 F)
Mar31.1 C (88.0 F)-22.2 C (-8.0 F)27.2 C (81.0 F)-10.0 C (14.0 F)
Apr32.8 C (91.0 F)-13.9 C (7.0 F)27.8 C (82.0 F)-2.2 C (28.0 F)
May36.1 C (97.0 F)-4.4 C (24.1 F)30.6 C (87.1 F)0.0 C (32.0 F)
Jun40.0 C (104.0 F)2.2 C (36.0 F)34.4 C (93.9 F)10.0 C (50.0 F)
Jul40.0 C (104.0 F)4.4 C (39.9 F)35.6 C (96.1 F)14.4 C (57.9 F)
Aug38.3 C (100.9 F)5.0 C (41.0 F)30.6 C (87.1 F)14.4 C (57.9 F)
Sep37.2 C (99.0 F)-2.2 C (28.0 F)35.6 C (96.1 F)9.4 C (48.9 F)
Oct32.8 C (91.0 F)-8.3 C (17.1 F)26.7 C (80.1 F)8.3 C (46.9 F)
Nov25.6 C (78.1 F)-17.2 C (1.0 F)n/an/a
Dec21.7 C (71.1 F)-31.7 C (-25.1 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Chicago by the year they were set 1,464 records at Chicago still stand. 1963 holds the most, with 57. 02040601958: 121959: 311960: 231961: 161962: 351963: 571964: 401965: 391966: 331967: 411968: 221969: 71970: 181971: 221972: 261973: 211974: 221975: 171976: 191977: 271978: 71979: 311980: 231981: 211982: 371983: 421984: 231985: 261986: 221987: 131988: 351989: 201990: 261991: 351992: 271993: 171994: 211995: 151996: 201997: 141998: 171999: 102000: 202001: 112002: 172003: 82004: 92005: 142006: 232007: 132008: 132009: 132010: 72011: 132012: 432013: 112014: 192015: 152016: 102017: 362018: 152019: 142020: 132021: 192022: 182023: 122024: 202025: 172026: 111958196519721979198619932000200720142021
1,464 records at Chicago still stand. 1963 holds the most, with 57.
Standing records at Chicago by the year they were set
Year setStanding records
195812
195931
196023
196116
196235
196357
196440
196539
196633
196741
196822
19697
197018
197122
197226
197321
197422
197517
197619
197727
19787
197931
198023
198121
198237
198342
198423
198526
198622
198713
198835
198920
199026
199135
199227
199317
199421
199515
199620
199714
199817
199910
200020
200111
200217
20038
20049
200514
200623
200713
200813
200913
20107
201113
201243
201311
201419
201515
201610
201736
201815
201914
202013
202119
202218
202312
202420
202517
202611

All-Time Record Progression

4 new records
When Chicago set new all-time records 4 all-time records were set at Chicago between 14 July 1995 and 23 July 2011. Each dot is a new record. Record high minimum temperatureRecord daily snowfallRecord daily precipitation14 July 1995: Record high minimum temperature 28.3 C (82.9 F)2 January 1999: Record daily snowfall 47.2 cm (18.6 in)13 September 2008: Record daily precipitation 168.7 mm (6.6 in)23 July 2011: Record daily precipitation 174.2 mm (6.9 in)1995200020052010
4 all-time records were set at Chicago between 14 July 1995 and 23 July 2011. Each dot is a new record.
When Chicago set new all-time records
DateKindDetail
1995-07-14Record high minimum temperatureRecord high minimum temperature 28.3 C (82.9 F)
1999-01-02Record daily snowfallRecord daily snowfall 47.2 cm (18.6 in)
2008-09-13Record daily precipitationRecord daily precipitation 168.7 mm (6.6 in)
2011-07-23Record daily precipitationRecord daily precipitation 174.2 mm (6.9 in)

Wettest Day of Each Month

Jul: 174.2 mm (6.9 in)
Record daily precipitation for each month at Chicago The wettest day on record for each calendar month at Chicago. The most was 174.2 mm (6.9 in) on 23 July 2011. 050100150200 Jan: 50.8 mm (2.0 in), 12 January 1960 Jan Feb: 87.4 mm (3.4 in), 21 February 1997 Feb Mar: 46.7 mm (1.8 in), 30 March 2017 Mar Apr: 89.9 mm (3.5 in), 18 April 2013 Apr May: 89.7 mm (3.5 in), 14 May 2020 May Jun: 100.8 mm (4.0 in), 19 June 2009 Jun Jul: 174.2 mm (6.9 in), 23 July 2011 Jul Aug: 164.8 mm (6.5 in), 14 August 1987 Aug Sep: 168.7 mm (6.6 in), 13 September 2008 Sep Oct: 108.0 mm (4.3 in), 10 October 1969 Oct Nov: 74.4 mm (2.9 in), 27 November 1990 Nov Dec: 113.5 mm (4.5 in), 2 December 1982 Dec
The wettest day on record for each calendar month at Chicago. The most was 174.2 mm (6.9 in) on 23 July 2011.
Record daily precipitation for each month at Chicago
MonthRecord daily precipitation (mm)Date
Jan50.8 mm (2.0 in)12 January 1960
Feb87.4 mm (3.4 in)21 February 1997
Mar46.7 mm (1.8 in)30 March 2017
Apr89.9 mm (3.5 in)18 April 2013
May89.7 mm (3.5 in)14 May 2020
Jun100.8 mm (4.0 in)19 June 2009
Jul174.2 mm (6.9 in)23 July 2011
Aug164.8 mm (6.5 in)14 August 1987
Sep168.7 mm (6.6 in)13 September 2008
Oct108.0 mm (4.3 in)10 October 1969
Nov74.4 mm (2.9 in)27 November 1990
Dec113.5 mm (4.5 in)2 December 1982

Period of Record Coverage

1958 to 2026
Days with data per year at Chicago 69 years of record at Chicago, 1958 to 2026. 2 years have data for under 90 percent of days and are left out of rankings: 1958, 2026. 1958: 61 of 365 days1959: 365 of 365 days1960: 366 of 366 days1961: 365 of 365 days1962: 365 of 365 days1963: 365 of 365 days1964: 366 of 366 days1965: 365 of 365 days1966: 365 of 365 days1967: 365 of 365 days1968: 366 of 366 days1969: 365 of 365 days1970: 365 of 365 days1971: 365 of 365 days1972: 366 of 366 days1973: 365 of 365 days1974: 365 of 365 days1975: 365 of 365 days1976: 366 of 366 days1977: 365 of 365 days1978: 365 of 365 days1979: 365 of 365 days1980: 366 of 366 days1981: 365 of 365 days1982: 365 of 365 days1983: 365 of 365 days1984: 366 of 366 days1985: 365 of 365 days1986: 365 of 365 days1987: 365 of 365 days1988: 366 of 366 days1989: 365 of 365 days1990: 365 of 365 days1991: 365 of 365 days1992: 366 of 366 days1993: 365 of 365 days1994: 365 of 365 days1995: 365 of 365 days1996: 366 of 366 days1997: 365 of 365 days1998: 365 of 365 days1999: 365 of 365 days2000: 366 of 366 days2001: 365 of 365 days2002: 365 of 365 days2003: 365 of 365 days2004: 366 of 366 days2005: 365 of 365 days2006: 365 of 365 days2007: 365 of 365 days2008: 366 of 366 days2009: 365 of 365 days2010: 365 of 365 days2011: 365 of 365 days2012: 366 of 366 days2013: 365 of 365 days2014: 365 of 365 days2015: 365 of 365 days2016: 366 of 366 days2017: 365 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: 283 of 365 days1960197019801990200020102020
69 years of record at Chicago, 1958 to 2026. 2 years have data for under 90 percent of days and are left out of rankings: 1958, 2026.
Days with data per year at Chicago
YearDays with dataShare of yearComplete
19586117%No
1959365100%Yes
1960366100%Yes
1961365100%Yes
1962365100%Yes
1963365100%Yes
1964366100%Yes
1965365100%Yes
1966365100%Yes
1967365100%Yes
1968366100%Yes
1969365100%Yes
1970365100%Yes
1971365100%Yes
1972366100%Yes
1973365100%Yes
1974365100%Yes
1975365100%Yes
1976366100%Yes
1977365100%Yes
1978365100%Yes
1979365100%Yes
1980366100%Yes
1981365100%Yes
1982365100%Yes
1983365100%Yes
1984366100%Yes
1985365100%Yes
1986365100%Yes
1987365100%Yes
1988366100%Yes
1989365100%Yes
1990365100%Yes
1991365100%Yes
1992366100%Yes
1993365100%Yes
1994365100%Yes
1995365100%Yes
1996366100%Yes
1997365100%Yes
1998365100%Yes
1999365100%Yes
2000366100%Yes
2001365100%Yes
2002365100%Yes
2003365100%Yes
2004366100%Yes
2005365100%Yes
2006365100%Yes
2007365100%Yes
2008366100%Yes
2009365100%Yes
2010365100%Yes
2011365100%Yes
2012366100%Yes
2013365100%Yes
2014365100%Yes
2015365100%Yes
2016366100%Yes
2017365100%Yes
2018365100%Yes
2019365100%Yes
2020366100%Yes
2021365100%Yes
2022365100%Yes
2023365100%Yes
2024366100%Yes
2025365100%Yes
202628378%No

Latest Records

Latest records at Chicago
DateStationRecordValueBeat old record byOld record stoodSignificance
9 September 2026Chicago Ohare Intl AP, USdaily high min (Provisional)21.7 C (71.1 F)0.6 C (1.1 F)43 years19 of 100 (Routine)
4 September 2026Chicago Ohare Intl AP, USdaily high min (Provisional)24.4 C (75.9 F)1.1 C (2.0 F)55 years24 of 100 (Routine)
3 September 2026Chicago Ohare Intl AP, USdaily high min (Provisional)25.0 C (77.0 F)2.2 C (4.0 F)55 years26 of 100 (Routine)
2 September 2026Chicago Ohare Intl AP, USmonthly high min (Provisional)25.6 C (78.1 F)0.6 C (1.1 F)12 years20 of 100 (Routine)
2 September 2026Chicago Ohare Intl AP, USdaily high max (Provisional)35.6 C (96.1 F)1.2 C (2.2 F)17 years13 of 100 (Routine)
1 September 2026Chicago Ohare Intl AP, USmonthly high min (Tie, Provisional)25.0 C (77.0 F)tie12 years4 of 100 (Routine)
31 August 2026Chicago Ohare Intl AP, USdaily rain (Provisional)16.5 mm (0.6 in)5.3 mm (0.21 in)45 years20 of 100 (Routine)
27 July 2026Chicago Ohare Intl AP, USdaily rain44.7 mm (1.8 in)26.7 mm (1.1 in)15 years28 of 100 (Routine)
16 July 2026Chicago Ohare Intl AP, USdaily high min (Tie)23.9 C (75.0 F)tie44 years4 of 100 (Routine)
3 July 2026Chicago Ohare Intl AP, USdaily rain43.4 mm (1.7 in)9.9 mm (0.39 in)21 years18 of 100 (Routine)
1 July 2026Chicago Ohare Intl AP, USdaily high min26.7 C (80.1 F)2.3 C (4.1 F)56 years28 of 100 (Routine)
30 June 2026Chicago Ohare Intl AP, USdaily high max (Tie)34.4 C (93.9 F)tie29 years3 of 100 (Routine)
29 June 2026Chicago Ohare Intl AP, USdaily high min24.4 C (75.9 F)1.6 C (2.9 F)55 years25 of 100 (Routine)
5 June 2026Chicago Ohare Intl AP, USdaily high min (Tie)21.1 C (70.0 F)tie5 years1 of 100 (Routine)
14 April 2026Chicago Ohare Intl AP, USdaily rain61.7 mm (2.4 in)36.0 mm (1.4 in)39 years52 of 100 (Notable)
13 April 2026Chicago Ohare Intl AP, USdaily high min16.7 C (62.1 F)2.3 C (4.1 F)57 years27 of 100 (Routine)
30 March 2026Chicago Ohare Intl AP, USdaily high max27.2 C (81.0 F)1.1 C (2.0 F)59 years24 of 100 (Routine)
17 March 2026Chicago Ohare Intl AP, USdaily low max-4.4 C (24.1 F)0.5 C (0.9 F)59 years23 of 100 (Routine)
15 March 2026Chicago Ohare Intl AP, USdaily rain44.7 mm (1.8 in)19.0 mm (0.7 in)41 years43 of 100 (Notable)
10 March 2026Chicago Ohare Intl AP, USdaily rain25.9 mm (1.0 in)3.8 mm (0.15 in)12 years14 of 100 (Routine)

Threshold Days in Chicago

How many days a year reach a given temperature or amount of rain. The combined page lists every threshold.

Download the Data

  • Data for Chicago standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Chicago 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 2026-10-13 (13 October 2026). The city record threads stations by a curated mapping and is not official.

Data as of . Last revised (2026-10-13).