All-time weather records — Dover, IL

Record high
102.9°F
July 6, 2012
Record low
-26.0°F
January 31, 2019
Wettest day
6.15 in
September 13, 2008

Climate change signal in Dover

20.2%

of Dover's all-time daily heat records were set in the last decade (74 of 366 records since 2015).

26.8%

of all-time daily cold records were set in the last decade (98 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 #
1980s
36
37
1990s
92
112
2000s
101
72
2010s
102
115
2020s
35
30

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 1988, the latest in 2024. Period of observation: 1987-2024.

Records by month

Month Hottest day Coldest day Wettest day
January 68.0°F — Jan 31, 1989 -26.0°F — Jan 31, 2019 1.98 in — Jan 29, 2001
February 70.0°F — Feb 18, 2017 -26.0°F — Feb 1, 2019 3.60 in — Feb 21, 1997
March 84.0°F — Mar 21, 2012 -9.0°F — Mar 3, 2014 1.74 in — Mar 1, 2017
April 93.0°F — Apr 18, 2002 16.0°F — Apr 2, 2018 3.87 in — Apr 18, 2013
May 97.0°F — May 27, 2012 28.0°F — May 9, 2020 3.21 in — May 8, 1995
June 102.0°F — Jun 25, 1988 39.9°F — Jun 1, 1993 4.60 in — Jun 29, 1990
July 102.9°F — Jul 6, 2012 48.0°F — Jul 2, 2001 3.08 in — Jul 5, 2022
August 102.0°F — Aug 1, 1988 44.1°F — Aug 19, 2006 2.65 in — Aug 10, 2006
September 98.1°F — Sep 1, 2011 30.0°F — Sep 23, 1995 6.15 in — Sep 13, 2008
October 89.1°F — Oct 4, 2005 19.0°F — Oct 30, 1988 3.41 in — Oct 15, 2017
November 79.0°F — Nov 1, 2000 3.0°F — Nov 12, 2019 2.20 in — Nov 27, 1990
December 71.1°F — Dec 16, 2021 -18.0°F — Dec 21, 1989 1.94 in — Dec 14, 2015

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