All-time weather records — Bull Valley, IL

Record high
102.9°F
July 6, 2012
Record low
-29.0°F
February 1, 2019
Wettest day
5.04 in
August 22, 2002

Climate change signal in Bull Valley

69.4%

of Bull Valley's all-time daily heat records were set in the last decade (254 of 366 records since 2015).

61.7%

of all-time daily cold records were set in the last decade (226 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 #
1990s
·
·
2000s
·
·
2010s
215
257
2020s
151
109

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 2011, the latest in 2026. Period of observation: 1991-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 59.0°F — Jan 30, 2013 -27.9°F — Jan 31, 2019 1.57 in — Jan 30, 2013
February 75.9°F — Feb 28, 2024 -29.0°F — Feb 1, 2019 2.08 in — Feb 25, 2018
March 84.9°F — Mar 22, 2012 -8.0°F — Mar 1, 2015 1.81 in — Mar 21, 2011
April 86.0°F — Apr 28, 2021 17.1°F — Apr 10, 2018 3.71 in — Apr 18, 2013
May 97.0°F — May 28, 2018 28.0°F — May 7, 2018 3.47 in — May 18, 2004
June 98.1°F — Jun 22, 2022 41.0°F — Jun 2, 2025 4.50 in — Jun 26, 2013
July 102.9°F — Jul 6, 2012 48.9°F — Jul 3, 2015 4.04 in — Jul 23, 2011
August 99.0°F — Aug 25, 2023 48.9°F — Aug 25, 2017 5.04 in — Aug 22, 2002
September 95.0°F — Sep 11, 2013 37.9°F — Sep 25, 2012 3.60 in — Sep 28, 1999
October 87.1°F — Oct 4, 2025 26.1°F — Oct 21, 2018 3.47 in — Oct 4, 1991
November 73.9°F — Nov 10, 2020 3.9°F — Nov 13, 2019 1.98 in — Nov 11, 1995
December 66.0°F — Dec 4, 2012 -9.9°F — Dec 19, 2016 2.17 in — Dec 11, 2021

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