All-time weather records — Morrison, IL

Record high
111.9°F
July 14, 1936
Record low
-35.0°F
January 31, 2019
Wettest day
6.10 in
October 10, 1954

Climate change signal in Morrison

7.9%

of Morrison's all-time daily heat records were set in the last decade (29 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 #
1890s
23
17
1900s
9
40
1910s
46
59
1920s
46
32
1930s
67
14
1940s
26
31
1950s
24
29
1960s
13
32
1970s
7
33
1980s
25
24
1990s
24
17
2000s
17
11
2010s
23
22
2020s
16
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 1896, the latest in 2026. Period of observation: 1895-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 64.9°F — Jan 2, 1897 -35.0°F — Jan 31, 2019 2.23 in — Jan 12, 1960
February 77.0°F — Feb 28, 2024 -35.0°F — Feb 1, 2019 1.77 in — Feb 27, 1948
March 86.0°F — Mar 30, 1986 -17.0°F — Mar 3, 2014 2.49 in — Mar 5, 1976
April 99.0°F — Apr 29, 1926 8.1°F — Apr 7, 1982 4.09 in — Apr 18, 2013
May 105.1°F — May 31, 1934 23.0°F — May 3, 2005 4.20 in — May 17, 1974
June 106.0°F — Jun 1, 1934 35.1°F — Jun 11, 1972 6.06 in — Jun 4, 2002
July 111.9°F — Jul 14, 1936 41.0°F — Jul 2, 1904 4.05 in — Jul 8, 1951
August 105.1°F — Aug 18, 1936 34.0°F — Aug 30, 1920 4.60 in — Aug 18, 1979
September 102.9°F — Sep 5, 1899 19.0°F — Sep 30, 1899 3.95 in — Sep 8, 1941
October 93.0°F — Oct 6, 1963 9.0°F — Oct 29, 1925 6.10 in — Oct 10, 1954
November 80.1°F — Nov 1, 1933 -7.1°F — Nov 26, 1977 2.68 in — Nov 17, 1952
December 77.0°F — Dec 8, 1937 -27.9°F — Dec 26, 1914 2.50 in — Dec 27, 1942

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