All-time weather records — Hartford, IA

Record high
103.5°F
July 25, 2012
Record low
-22.2°F
January 16, 2009
Wettest day
4.54 in
June 26, 2008

Climate change signal in Hartford

58.7%

of Hartford's all-time daily heat records were set in the last decade (215 of 366 records since 2015).

45.4%

of all-time daily cold records were set in the last decade (166 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 #
2000s
63
97
2010s
164
184
2020s
139
85

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 2004, the latest in 2026. Period of observation: 2004-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 68.0°F — Jan 19, 2006 -22.2°F — Jan 16, 2009 1.13 in — Jan 8, 2026
February 77.4°F — Feb 26, 2024 -19.7°F — Feb 16, 2021 1.37 in — Feb 24, 2007
March 91.8°F — Mar 21, 2026 -10.7°F — Mar 3, 2014 1.84 in — Mar 6, 2026
April 94.5°F — Apr 1, 2010 12.7°F — Apr 4, 2018 3.08 in — Apr 17, 2013
May 96.3°F — May 28, 2018 27.1°F — May 3, 2011 2.41 in — May 21, 2024
June 98.6°F — Jun 17, 2021 41.9°F — Jun 1, 2012 4.54 in — Jun 26, 2008
July 103.5°F — Jul 25, 2012 47.8°F — Jul 29, 2013 2.76 in — Jul 2, 2024
August 100.0°F — Aug 6, 2022 43.7°F — Aug 18, 2012 4.28 in — Aug 10, 2010
September 99.7°F — Sep 9, 2013 30.9°F — Sep 23, 2012 2.93 in — Sep 3, 2018
October 92.8°F — Oct 1, 2023 19.0°F — Oct 19, 2022 3.68 in — Oct 1, 2019
November 78.6°F — Nov 8, 2006 0.0°F — Nov 12, 2019 1.44 in — Nov 4, 2022
December 75.2°F — Dec 15, 2021 -17.1°F — Dec 24, 2013 1.77 in — Dec 13, 2015

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