All-time weather records — Little Sioux, IA

Record high
105.1°F
July 24, 2012
Record low
-31.0°F
February 17, 2021
Wettest day
5.34 in
September 16, 2016

Climate change signal in Little Sioux

52.2%

of Little Sioux's all-time daily heat records were set in the last decade (191 of 366 records since 2015).

41.3%

of all-time daily cold records were set in the last decade (151 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
88
127
2010s
154
156
2020s
124
83

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 2002, the latest in 2026. Period of observation: 2002-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 66.0°F — Jan 31, 2012 -29.9°F — Jan 4, 2010 0.80 in — Jan 17, 2023
February 81.0°F — Feb 27, 2024 -31.0°F — Feb 17, 2021 1.17 in — Feb 13, 2005
March 97.0°F — Mar 22, 2026 -15.0°F — Mar 4, 2019 1.70 in — Mar 15, 2021
April 91.9°F — Apr 2, 2012 6.1°F — Apr 7, 2018 4.19 in — Apr 30, 2003
May 104.0°F — May 15, 2013 25.0°F — May 3, 2011 4.25 in — May 2, 2018
June 104.0°F — Jun 18, 2021 39.9°F — Jun 13, 2014 3.50 in — Jun 10, 2003
July 105.1°F — Jul 24, 2012 44.1°F — Jul 16, 2014 3.85 in — Jul 13, 2017
August 100.9°F — Aug 1, 2006 0.0°F — Aug 30, 2003 4.25 in — Aug 2, 2023
September 102.0°F — Sep 21, 2022 26.1°F — Sep 24, 2012 5.34 in — Sep 16, 2016
October 91.0°F — Oct 1, 2024 10.9°F — Oct 27, 2020 2.56 in — Oct 4, 2002
November 84.9°F — Nov 5, 2025 -5.1°F — Nov 12, 2019 1.70 in — Nov 12, 2015
December 73.0°F — Dec 16, 2021 -20.0°F — Dec 19, 2016 2.75 in — Dec 14, 2015

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