All-time weather records — Savanna, IL

Record high
108.0°F
July 12, 1936
Record low
-63.9°F
July 26, 1922
Wettest day
6.96 in
June 4, 2002

Climate change signal in Savanna

10.1%

of Savanna's all-time daily heat records were set in the last decade (37 of 366 records since 2015).

4.6%

of all-time daily cold records were set in the last decade (17 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 #
1890s
2
11
1900s
26
49
1910s
42
35
1920s
31
22
1930s
67
24
1940s
21
9
1950s
17
15
1960s
12
21
1970s
8
33
1980s
24
89
1990s
26
21
2000s
27
15
2010s
48
21
2020s
15
1

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 1899, the latest in 2026. Period of observation: 1895-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 61.0°F — Jan 27, 1944 -38.0°F — Jan 31, 2019 2.00 in — Jan 11, 1996
February 75.0°F — Feb 28, 2024 -36.0°F — Feb 1, 2019 2.05 in — Feb 9, 2001
March 84.9°F — Mar 30, 1986 -16.1°F — Mar 1, 1962 2.87 in — Mar 5, 1976
April 91.9°F — Apr 10, 1930 -2.0°F — Apr 7, 1982 3.77 in — Apr 18, 2013
May 104.0°F — May 31, 1934 15.1°F — May 7, 1989 4.00 in — May 14, 1983
June 104.0°F — Jun 1, 1934 30.9°F — Jun 10, 1988 6.96 in — Jun 4, 2002
July 108.0°F — Jul 12, 1936 -63.9°F — Jul 26, 1922 4.60 in — Jul 24, 2010
August 102.9°F — Aug 18, 1936 32.0°F — Aug 28, 1986 5.01 in — Aug 11, 1911
September 99.0°F — Sep 4, 1925 14.0°F — Sep 30, 1899 5.00 in — Sep 14, 1961
October 91.0°F — Oct 4, 1997 -45.9°F — Oct 19, 1914 3.85 in — Oct 31, 1960
November 79.0°F — Nov 1, 1933 -15.0°F — Nov 29, 1976 3.92 in — Nov 17, 1952
December 72.0°F — Dec 10, 1996 -27.9°F — Dec 26, 1914 2.20 in — Dec 15, 1971

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