Chicago, IL: records

4 October 2026: The hottest day on record in Chicago, IL: 105°F on Tuesday 24 July 1934.

The record begins: 1871

All-time records

Hottest day: 105°F; 24 July 1934
Coldest night: -27°F; 20 January 1985
Wettest day: 6.86 in; 23 July 2011
Warmest night: 85°F; 29 July 1916
Coldest day: -11°F; 18 January 1994, 24 December 1983

Daily records by decade

New daily records set in Chicago, IL by decade since the 1900s: the most record highs, 114, came in the 1910s; the most record lows, 103, in the 1980s.

Record highs
Record lows

Every decade as a table

Decade	Record highs	Record lows	Years in the record
1870s	0	0	9
1880s	0	0	10
1890s	0	0	10
1900s	86	44	10
1910s	114	29	10
1920s	71	28	10
1930s	104	18	10
1940s	75	74	10
1950s	87	31	10
1960s	33	40	10
1970s	51	52	10
1980s	44	103	10
1990s	24	43	10
2000s	18	17	10
2010s	30	8	10
2020s	20	0	7

Records by month

Month	Highest	Lowest	Wettest day
January	67°F 25 January 1950	-27°F 20 January 1985	2.76 in 12 January 1960
February	75°F 27 February 1976	-21°F 9 February 1899	3.44 in 21 February 1997
March	88°F 29 March 1986	-12°F 4 March 1873	3.20 in 25 March 1884
April	91°F 22 April 1980, 30 April 1942	7°F 7 April 1982	3.83 in 18 April 1975
May	98°F 31 May 1934	27°F 9 May 1983, 2 May 1875	3.53 in 14 May 2020
June	104°F 20 June 1988, 20 June 1953	35°F 4 June 1945	4.64 in 13 June 1976
July	105°F 24 July 1934	45°F 7 July 1983	6.86 in 23 July 2011
August	102°F 5 August 1918	42°F 28 August 1986	6.49 in 14 August 1987
September	101°F 2 September 1953, 1 September 1953	29°F 23 September 1995, 30 September 1984, 28 September 1942	6.64 in 13 September 2008
October	94°F 6 October 1963	14°F 25 October 1887	4.19 in 14 October 2017
November	81°F 1 November 1950	-2°F 24 November 1950, 29 November 1872	3.34 in 5 November 1883
December	71°F 2 December 1982, 3 December 1970	-25°F 24 December 1983	4.47 in 2 December 1982

Streaks, months and years

Longest heat streak	11 days	19 August to 29 August 1959	A high of 90°F or above
Longest cold streak	43 days	28 December 1976 to 8 February 1977	A high of 32°F or below
Wettest month	17.10 in	August 1987
Driest month	0.01 in	September 1979
Wettest year	50.86 in	2008
Driest year	22.22 in	1962

Every record in words

The coldest night on record in Chicago, IL: a low of -27°F on Sunday 20 January 1985.
The wettest day on record in Chicago, IL: 6.86 in on Saturday 23 July 2011.
The warmest night on record in Chicago, IL: a low of 85°F on Saturday 29 July 1916.
The coldest day on record in Chicago, IL: a high of -11°F on Tuesday 18 January 1994 and Saturday 24 December 1983.
The longest run of days with a high of 90°F or above in Chicago, IL: 11 days, from Wednesday 19 August to Saturday 29 August 1959.
The longest run of days with a high of 32°F or below in Chicago, IL: 43 days, from Tuesday 28 December 1976 to Tuesday 8 February 1977.
The wettest month on record in Chicago, IL: August 1987, with 17.10 in of precipitation.
The driest month on record in Chicago, IL: September 1979, with 0.01 in of precipitation.
The wettest year on record in Chicago, IL: 2008, with 50.86 in of precipitation.
The driest year on record in Chicago, IL: 1962, with 22.22 in of precipitation.

Chicago, IL the day's answers