All-time weather records — South Barrington, IL

Record high
102.9°F
July 10, 1974
Record low
-27.9°F
January 31, 2019
Wettest day
5.72 in
July 23, 2011

Climate change signal in South Barrington

14.8%

of South Barrington's all-time daily heat records were set in the last decade (54 of 366 records since 2015).

6%

of all-time daily cold records were set in the last decade (22 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 #
1960s
76
104
1970s
57
93
1980s
86
78
1990s
26
24
2000s
41
26
2010s
52
36
2020s
28
5

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 1962, the latest in 2026. Period of observation: 1962-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 62.1°F — Jan 8, 2008 -27.9°F — Jan 31, 2019 4.40 in — Jan 19, 2019
February 73.9°F — Feb 28, 2024 -26.0°F — Feb 1, 2019 3.10 in — Feb 21, 1997
March 84.0°F — Mar 22, 2012 -9.0°F — Mar 4, 2002 1.93 in — Mar 13, 2006
April 89.1°F — Apr 23, 1980 5.0°F — Apr 7, 1982 3.89 in — Apr 18, 2013
May 93.0°F — May 19, 1975 21.9°F — May 10, 1966 4.48 in — May 31, 2018
June 102.0°F — Jun 28, 1971 30.0°F — Jun 3, 2000 3.02 in — Jun 29, 2017
July 102.9°F — Jul 10, 1974 37.9°F — Jul 1, 1965 5.72 in — Jul 23, 2011
August 100.0°F — Aug 2, 1988 37.9°F — Aug 28, 1986 5.36 in — Aug 22, 2002
September 96.1°F — Sep 8, 1971 25.0°F — Sep 29, 1964 4.17 in — Sep 23, 1986
October 88.0°F — Oct 1, 1971 14.0°F — Oct 30, 1988 3.00 in — Oct 15, 2017
November 75.0°F — Nov 1, 1968 -9.9°F — Nov 30, 1976 2.12 in — Nov 11, 1995
December 66.9°F — Dec 4, 2012 -20.0°F — Dec 24, 1983 2.10 in — Dec 3, 1982

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