All-time weather records — Allison, IA

Record high
109.0°F
July 13, 1936
Record low
-31.0°F
February 2, 1996
Wettest day
7.16 in
July 17, 1968

Climate change signal in Allison

10.1%

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

7.1%

of all-time daily cold records were set in the last decade (26 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 #
1910s
14
45
1920s
33
64
1930s
85
60
1940s
36
29
1950s
21
30
1960s
26
27
1970s
9
29
1980s
33
29
1990s
25
13
2000s
25
8
2010s
38
21
2020s
21
11

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 1914, the latest in 2026. Period of observation: 1914-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 64.0°F — Jan 26, 2002 -29.9°F — Jan 5, 1924 1.75 in — Jan 22, 2018
February 75.0°F — Feb 27, 2024 -31.0°F — Feb 2, 1996 1.70 in — Feb 27, 1948
March 84.9°F — Mar 21, 2026 -25.1°F — Mar 11, 1948 1.95 in — Mar 30, 1993
April 96.1°F — Apr 22, 1980 5.0°F — Apr 6, 1982 4.00 in — Apr 25, 2008
May 106.0°F — May 31, 1934 25.0°F — May 1, 1966 3.86 in — May 17, 1999
June 105.1°F — Jun 28, 1934 36.0°F — Jun 4, 1945 7.00 in — Jun 26, 1951
July 109.0°F — Jul 13, 1936 42.1°F — Jul 3, 1917 7.16 in — Jul 17, 1968
August 107.1°F — Aug 18, 1936 28.9°F — Aug 21, 2006 5.24 in — Aug 20, 2007
September 100.9°F — Sep 3, 1939 25.0°F — Sep 26, 1926 4.72 in — Sep 8, 1941
October 96.1°F — Oct 5, 1963 0.0°F — Oct 29, 1925 3.10 in — Oct 9, 1970
November 80.1°F — Nov 8, 1999 -16.1°F — Nov 26, 1977 2.58 in — Nov 1, 1992
December 70.0°F — Dec 16, 2021 -27.0°F — Dec 10, 1919 4.00 in — Dec 9, 2008

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