All-time weather records — Donnellson, IA

Record high
107.1°F
July 24, 2012
Record low
-18.9°F
January 14, 2024
Wettest day
6.65 in
August 5, 1970

Climate change signal in Donnellson

54.9%

of Donnellson's all-time daily heat records were set in the last decade (201 of 366 records since 2015).

45.1%

of all-time daily cold records were set in the last decade (165 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 #
1930s
·
·
1940s
·
·
1950s
·
·
1960s
·
·
1970s
·
·
1980s
·
·
1990s
·
·
2000s
54
81
2010s
203
201
2020s
109
84

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 2006, the latest in 2026. Period of observation: 1938-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 64.9°F — Jan 8, 2008 -18.9°F — Jan 14, 2024 2.31 in — Jan 24, 1938
February 77.0°F — Feb 28, 2024 -11.0°F — Feb 10, 2014 2.09 in — Feb 21, 1997
March 89.1°F — Mar 22, 2026 -9.0°F — Mar 3, 2014 2.88 in — Mar 4, 1985
April 89.1°F — Apr 30, 2007 8.1°F — Apr 2, 2018 4.67 in — Apr 24, 1976
May 98.1°F — May 28, 2018 32.0°F — May 4, 2011 3.23 in — May 27, 1996
June 100.0°F — Jun 29, 2012 46.0°F — Jun 3, 2013 4.51 in — Jun 18, 1946
July 107.1°F — Jul 24, 2012 50.0°F — Jul 28, 2013 3.72 in — Jul 26, 2025
August 102.0°F — Aug 8, 2012 46.0°F — Aug 31, 2009 6.65 in — Aug 5, 1970
September 102.0°F — Sep 10, 2013 36.0°F — Sep 15, 2007 4.91 in — Sep 13, 2008
October 93.9°F — Oct 4, 2006 19.9°F — Oct 30, 2017 3.13 in — Oct 13, 1966
November 81.0°F — Nov 2, 2016 3.0°F — Nov 12, 2019 3.04 in — Nov 1, 1984
December 73.9°F — Dec 16, 2021 -11.0°F — Dec 23, 2022 2.92 in — Dec 2, 1982

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