All-time weather records — McCullom Lake, IL

Record high
100.9°F
July 6, 2012
Record low
-32.1°F
January 31, 2019
Wettest day
4.77 in
July 15, 1985

Climate change signal in McCullom Lake

45.6%

of McCullom Lake's all-time daily heat records were set in the last decade (167 of 366 records since 2015).

26.2%

of all-time daily cold records were set in the last decade (96 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 #
1940s
·
·
1950s
·
·
1970s
·
·
1980s
·
·
1990s
70
104
2000s
79
101
2010s
112
117
2020s
105
44

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 1993, the latest in 2026. Period of observation: 1948-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 62.1°F — Jan 8, 2008 -32.1°F — Jan 31, 2019 1.72 in — Jan 14, 1995
February 78.1°F — Feb 28, 2024 -23.1°F — Feb 3, 1996 2.06 in — Feb 21, 1997
March 82.9°F — Mar 21, 2012 -13.0°F — Mar 5, 2015 2.87 in — Mar 5, 1976
April 90.0°F — Apr 19, 2002 14.0°F — Apr 5, 1995 3.81 in — Apr 18, 2013
May 99.0°F — May 28, 2018 26.1°F — May 3, 2004 2.84 in — May 18, 2004
June 100.0°F — Jun 15, 2022 35.1°F — Jun 1, 1993 4.40 in — Jun 26, 2013
July 100.9°F — Jul 6, 2012 44.1°F — Jul 2, 2001 4.77 in — Jul 15, 1985
August 98.1°F — Aug 25, 2023 39.9°F — Aug 31, 2009 4.58 in — Aug 14, 1987
September 96.1°F — Sep 23, 2017 28.0°F — Sep 23, 1995 4.55 in — Sep 12, 2019
October 90.0°F — Oct 4, 2025 21.9°F — Oct 25, 2006 2.68 in — Oct 18, 1998
November 78.1°F — Nov 11, 2022 3.9°F — Nov 13, 2019 1.81 in — Nov 11, 1995
December 68.0°F — Dec 6, 2001 -18.9°F — Dec 25, 2000 1.70 in — Dec 10, 2003

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