All-time weather records — Stillman Valley, IL

Record high
105.1°F
July 7, 2012
Record low
-30.8°F
January 31, 2019
Wettest day
5.70 in
August 14, 1987

Climate change signal in Stillman Valley

19.7%

of Stillman Valley's all-time daily heat records were set in the last decade (72 of 366 records since 2015).

6.3%

of all-time daily cold records were set in the last decade (23 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 #
1950s
60
45
1960s
25
79
1970s
34
73
1980s
54
68
1990s
37
40
2000s
45
28
2010s
63
27
2020s
48
6

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 1952, the latest in 2026. Period of observation: 1951-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 63.0°F — Jan 7, 2008 -30.8°F — Jan 31, 2019 2.46 in — Jan 12, 1960
February 78.1°F — Feb 27, 2024 -24.0°F — Feb 3, 1996 1.65 in — Feb 9, 1966
March 84.9°F — Mar 29, 1986 -11.0°F — Mar 1, 1962 2.50 in — Mar 4, 1976
April 91.0°F — Apr 18, 2002 5.0°F — Apr 7, 1982 3.38 in — Apr 21, 1973
May 99.0°F — May 27, 2012 24.1°F — May 10, 1966 4.77 in — May 28, 1996
June 100.9°F — Jun 20, 1988 37.0°F — Jun 1, 1993 4.20 in — Jun 19, 2009
July 105.1°F — Jul 7, 2012 43.0°F — Jul 5, 1967 4.99 in — Jul 8, 1951
August 104.0°F — Aug 16, 1988 41.0°F — Aug 25, 1958 5.70 in — Aug 14, 1987
September 102.0°F — Sep 1, 1953 27.0°F — Sep 30, 1984 5.56 in — Sep 13, 1961
October 90.0°F — Oct 1, 1971 15.1°F — Oct 29, 1952 4.78 in — Oct 10, 1954
November 77.0°F — Nov 1, 2016 -9.9°F — Nov 26, 1977 2.09 in — Nov 16, 1961
December 69.1°F — Dec 3, 2012 -24.0°F — Dec 24, 1983 2.00 in — Dec 2, 1982

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