All-time weather records — Martelle, IA

Record high
100.9°F
July 26, 2012
Record low
-27.0°F
January 31, 2019
Wettest day
3.84 in
April 18, 2013

Climate change signal in Martelle

74.9%

of Martelle's all-time daily heat records were set in the last decade (274 of 366 records since 2015).

69.1%

of all-time daily cold records were set in the last decade (253 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 #
2010s
208
229
2020s
158
137

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 2011, the latest in 2026. Period of observation: 2011-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 59.0°F — Jan 6, 2012 -27.0°F — Jan 31, 2019 0.89 in — Jan 22, 2018
February 73.9°F — Feb 23, 2017 -27.0°F — Feb 1, 2019 1.30 in — Feb 27, 2023
March 86.0°F — Mar 22, 2026 -15.0°F — Mar 1, 2015 1.54 in — Mar 5, 2025
April 82.9°F — Apr 15, 2024 15.1°F — Apr 7, 2018 3.84 in — Apr 18, 2013
May 97.0°F — May 28, 2018 27.0°F — May 9, 2020 1.86 in — May 14, 2018
June 93.9°F — Jun 11, 2021 42.1°F — Jun 1, 2015 3.71 in — Jun 30, 2014
July 100.9°F — Jul 26, 2012 46.9°F — Jul 29, 2013 2.48 in — Jul 9, 2022
August 100.0°F — Aug 24, 2023 46.0°F — Aug 26, 2025 3.40 in — Aug 8, 2022
September 97.0°F — Sep 10, 2013 30.0°F — Sep 24, 2012 2.12 in — Sep 3, 2018
October 91.9°F — Oct 1, 2023 21.0°F — Oct 20, 2022 2.61 in — Oct 14, 2014
November 75.0°F — Nov 2, 2016 -2.0°F — Nov 13, 2019 2.22 in — Nov 5, 2022
December 71.1°F — Dec 16, 2021 -13.0°F — Dec 24, 2013 1.68 in — Dec 14, 2015

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