All-time weather records — Colwell, IA

Record high
108.0°F
July 21, 1901
Record low
-34.1°F
January 16, 2009
Wettest day
6.65 in
July 21, 1999

Climate change signal in Colwell

13.1%

of Colwell's all-time daily heat records were set in the last decade (48 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
33
71
1900s
19
34
1940s
7
2
1950s
48
30
1960s
34
53
1970s
23
37
1980s
53
49
1990s
32
36
2000s
44
31
2010s
39
14
2020s
34
9

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 63.0°F — Jan 26, 2002 -34.1°F — Jan 16, 2009 1.40 in — Jan 4, 1971
February 75.0°F — Feb 26, 2024 -32.1°F — Feb 2, 1996 1.56 in — Feb 25, 2007
March 86.0°F — Mar 29, 1895 -32.1°F — Mar 1, 1962 2.41 in — Mar 26, 2004
April 93.9°F — Apr 22, 1980 3.0°F — Apr 6, 1982 3.06 in — Apr 18, 1976
May 98.1°F — May 14, 2013 21.0°F — May 3, 2005 3.55 in — May 10, 1963
June 102.0°F — Jun 8, 1985 34.0°F — Jun 12, 1903 3.67 in — Jun 19, 1904
July 108.0°F — Jul 21, 1901 39.0°F — Jul 30, 1899 6.65 in — Jul 21, 1999
August 104.0°F — Aug 17, 1988 36.0°F — Aug 29, 1893 6.30 in — Aug 10, 1980
September 99.0°F — Sep 9, 1955 19.0°F — Sep 30, 1899 6.35 in — Sep 22, 2016
October 95.0°F — Oct 5, 1963 9.0°F — Oct 30, 1895 3.22 in — Oct 9, 1970
November 78.1°F — Nov 8, 1999 -14.1°F — Nov 26, 1977 2.78 in — Nov 1, 1991
December 68.0°F — Dec 15, 2021 -29.0°F — Dec 25, 2000 1.49 in — Dec 14, 2015

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