All-time weather records — Lerna, IL

Record high
118.9°F
June 20, 2002
Record low
-13.9°F
January 6, 2014
Wettest day
4.70 in
June 10, 2018

Climate change signal in Lerna

34.4%

of Lerna's all-time daily heat records were set in the last decade (126 of 366 records since 2015).

33.9%

of all-time daily cold records were set in the last decade (124 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
32
19
2000s
113
141
2010s
149
136
2020s
72
70

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 1998, the latest in 2026. Period of observation: 1998-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 66.0°F — Jan 7, 2008 -13.9°F — Jan 6, 2014 2.45 in — Jan 11, 2020
February 73.9°F — Feb 24, 2000 -12.8°F — Feb 7, 2014 2.14 in — Feb 11, 2009
March 86.0°F — Mar 22, 2026 -5.8°F — Mar 6, 2015 2.15 in — Mar 30, 2022
April 87.1°F — Apr 30, 2007 22.1°F — Apr 2, 2013 4.10 in — Apr 3, 2018
May 93.9°F — May 28, 2018 30.9°F — May 3, 2005 3.10 in — May 12, 2002
June 118.9°F — Jun 20, 2002 -0.8°F — Jun 1, 2011 4.70 in — Jun 10, 2018
July 106.0°F — Jul 7, 2012 -0.8°F — Jul 22, 2008 3.65 in — Jul 9, 2024
August 99.0°F — Aug 2, 2012 -0.8°F — Aug 12, 2009 2.67 in — Aug 15, 2016
September 99.0°F — Sep 1, 2011 34.0°F — Sep 25, 2001 3.95 in — Sep 10, 2000
October 91.9°F — Oct 1, 2019 24.3°F — Oct 21, 2018 3.30 in — Oct 11, 2019
November 79.0°F — Nov 1, 2016 3.2°F — Nov 12, 2019 1.68 in — Nov 18, 2003
December 71.1°F — Dec 4, 1998 -9.0°F — Dec 14, 2025 2.84 in — Dec 26, 2015

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