All-time weather records — Morrison, IA

Record high
108.0°F
August 18, 1936
Record low
-34.1°F
February 13, 1905
Wettest day
6.25 in
July 10, 2000

Climate change signal in Morrison

9.3%

of Morrison's all-time daily heat records were set in the last decade (34 of 366 records since 2015).

2.5%

of all-time daily cold records were set in the last decade (9 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
16
46
1900s
12
37
1910s
42
36
1920s
34
29
1930s
89
22
1940s
23
34
1950s
18
24
1960s
11
46
1970s
7
30
1980s
21
20
1990s
21
15
2000s
25
14
2010s
25
10
2020s
22
3

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 1893, the latest in 2026. Period of observation: 1893-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 69.1°F — Jan 21, 1914 -32.1°F — Jan 12, 1912 3.00 in — Jan 4, 1922
February 75.9°F — Feb 16, 1914 -34.1°F — Feb 13, 1905 1.42 in — Feb 25, 2007
March 89.1°F — Mar 29, 1895 -27.9°F — Mar 1, 1962 6.00 in — Mar 3, 1924
April 97.0°F — Apr 24, 1914 -0.9°F — Apr 4, 1975 4.42 in — Apr 25, 2008
May 106.0°F — May 31, 1934 19.9°F — May 4, 1907 3.65 in — May 30, 2013
June 106.0°F — Jun 27, 1934 35.1°F — Jun 3, 1945 5.60 in — Jun 10, 1900
July 107.1°F — Jul 13, 1936 5.0°F — Jul 3, 1992 6.25 in — Jul 10, 2000
August 108.0°F — Aug 18, 1936 37.0°F — Aug 20, 1950 5.22 in — Aug 27, 1923
September 100.9°F — Sep 7, 1939 19.9°F — Sep 30, 1899 4.55 in — Sep 18, 1900
October 93.9°F — Oct 4, 1997 -5.1°F — Oct 30, 1925 3.85 in — Oct 4, 1919
November 80.1°F — Nov 14, 1999 -14.1°F — Nov 26, 1977 3.00 in — Nov 4, 2003
December 73.0°F — Dec 3, 1998 -27.0°F — Dec 26, 1914 4.00 in — Dec 14, 1920

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