All-time weather records — Berwyn, IL

Record high
104.0°F
July 6, 2012
Record low
-21.8°F
January 30, 2019
Wettest day
5.20 in
October 14, 2017

Climate change signal in Berwyn

43.7%

of Berwyn's all-time daily heat records were set in the last decade (160 of 366 records since 2015).

30.1%

of all-time daily cold records were set in the last decade (110 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
34
43
2000s
110
146
2010s
123
139
2020s
99
38

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 1997, the latest in 2026. Period of observation: 1997-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 90.0°F — Jan 17, 2017 -21.8°F — Jan 30, 2019 2.06 in — Jan 8, 2026
February 73.9°F — Feb 27, 2024 -8.9°F — Feb 5, 2007 2.31 in — Feb 20, 2018
March 86.0°F — Mar 21, 2012 -4.0°F — Mar 4, 2002 2.00 in — Mar 30, 2017
April 89.1°F — Apr 15, 2002 21.2°F — Apr 7, 2018 1.97 in — Apr 29, 2020
May 97.0°F — May 27, 2012 16.0°F — May 6, 1998 3.67 in — May 17, 2020
June 100.9°F — Jun 21, 2022 39.0°F — Jun 1, 2003 2.37 in — Jun 21, 2018
July 104.0°F — Jul 6, 2012 45.0°F — Jul 18, 2017 4.73 in — Jul 24, 2010
August 100.0°F — Aug 24, 2023 48.9°F — Aug 26, 2014 3.66 in — Aug 26, 2012
September 96.1°F — Sep 10, 2013 42.1°F — Sep 13, 2014 3.15 in — Sep 18, 2015
October 90.0°F — Oct 3, 2025 1.9°F — Oct 24, 2002 5.20 in — Oct 14, 2017
November 80.1°F — Nov 4, 2014 9.1°F — Nov 12, 2019 1.78 in — Nov 18, 2003
December 72.0°F — Dec 3, 2012 -8.9°F — Dec 23, 2022 1.82 in — Dec 28, 2015

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