All-time weather records — McLean, IL

Record high
102.0°F
July 7, 2012
Record low
-20.9°F
January 17, 2009
Wettest day
4.60 in
July 9, 2003

Climate change signal in McLean

0.3%

of McLean's all-time daily heat records were set in the last decade (1 of 366 records since 2015).

5.2%

of all-time daily cold records were set in the last decade (19 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
19
9
2000s
280
237
2010s
67
120

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 1999, the latest in 2015. Period of observation: 1999-2015.

Records by month

Month Hottest day Coldest day Wettest day
January 66.0°F — Jan 8, 2008 -20.9°F — Jan 17, 2009 3.18 in — Jan 8, 2008
February 73.9°F — Feb 25, 2000 -11.9°F — Feb 12, 2014 1.94 in — Feb 25, 2001
March 84.0°F — Mar 22, 2012 -6.0°F — Mar 4, 2014 1.33 in — Mar 23, 2007
April 91.9°F — Apr 15, 2002 19.0°F — Apr 8, 2007 1.72 in — Apr 17, 2006
May 95.0°F — May 29, 2006 28.0°F — May 4, 2005 2.75 in — May 17, 2001
June 100.0°F — Jun 26, 2005 37.9°F — Jun 1, 2003 3.52 in — Jun 8, 2015
July 102.0°F — Jul 7, 2012 45.0°F — Jul 1, 2001 4.60 in — Jul 9, 2003
August 100.0°F — Aug 21, 2003 45.0°F — Aug 12, 2004 3.20 in — Aug 31, 2003
September 99.0°F — Sep 2, 2011 34.0°F — Sep 15, 2007 2.80 in — Sep 14, 2008
October 93.9°F — Oct 4, 2006 24.1°F — Oct 24, 1999 2.98 in — Oct 23, 2009
November 82.9°F — Nov 1, 2000 7.0°F — Nov 19, 2014 1.65 in — Nov 17, 2003
December 70.0°F — Dec 4, 2012 -9.0°F — Dec 24, 2000 2.00 in — Dec 1, 2006

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