All-time weather records — Cooksville, IL

Record high
107.1°F
July 8, 2012
Record low
-23.1°F
January 20, 1985
Wettest day
5.63 in
July 10, 2003

Climate change signal in Cooksville

24%

of Cooksville's all-time daily heat records were set in the last decade (88 of 366 records since 2015).

21.3%

of all-time daily cold records were set in the last decade (78 of 366 records since 2015).

If records were spread evenly across the station's history, you'd expect roughly 5% per decade. Decade-by-decade, here's where each record-breaking day was set:

Decade Heat records set # Cold records set #
1970s
11
28
1980s
102
84
1990s
45
82
2000s
58
40
2010s
97
98
2020s
53
34

Records are the all-time daily extremes that are still standing — each daily record can only be held by one year. The station's earliest hot record was set in 1977, the latest in 2026. Period of observation: 1977-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 66.0°F — Jan 8, 2008 -23.1°F — Jan 20, 1985 2.35 in — Jan 8, 2008
February 75.9°F — Feb 28, 2024 -20.0°F — Feb 6, 1982 2.27 in — Feb 23, 1985
March 88.0°F — Mar 27, 2026 -9.0°F — Mar 4, 2014 1.65 in — Mar 5, 2004
April 91.0°F — Apr 25, 1986 5.0°F — Apr 2, 2018 3.15 in — Apr 16, 2006
May 98.1°F — May 28, 2018 26.1°F — May 7, 1989 3.21 in — May 20, 1984
June 102.9°F — Jun 25, 1988 35.1°F — Jun 1, 1993 3.50 in — Jun 2, 1980
July 107.1°F — Jul 8, 2012 46.0°F — Jul 2, 2024 5.63 in — Jul 10, 2003
August 102.9°F — Aug 16, 1988 41.0°F — Aug 28, 1986 4.83 in — Aug 6, 1977
September 100.9°F — Sep 2, 2011 30.9°F — Sep 30, 1984 5.21 in — Sep 20, 1986
October 91.9°F — Oct 4, 2025 18.0°F — Oct 24, 1981 3.53 in — Oct 3, 1986
November 80.1°F — Nov 1, 2000 1.0°F — Nov 26, 1977 1.94 in — Nov 1, 1994
December 72.0°F — Dec 4, 2012 -22.0°F — Dec 22, 1989 2.64 in — Dec 29, 1990

Click a month to see every daily record for that month in Cooksville.