All-time weather records — Altona, IL

Record high
102.0°F
July 24, 2012
Record low
-32.1°F
January 26, 2019
Wettest day
4.60 in
May 26, 2011

Climate change signal in Altona

57.9%

of Altona's all-time daily heat records were set in the last decade (212 of 366 records since 2015).

42.3%

of all-time daily cold records were set in the last decade (155 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
53
90
2010s
206
211
2020s
107
65

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 2024. Period of observation: 2005-2025.

Records by month

Month Hottest day Coldest day Wettest day
January 62.1°F — Jan 30, 2013 -32.1°F — Jan 26, 2019 1.92 in — Jan 17, 2017
February 75.0°F — Feb 28, 2024 -24.0°F — Feb 11, 2014 1.57 in — Feb 20, 2018
March 82.0°F — Mar 22, 2012 -11.9°F — Mar 1, 2015 1.63 in — Mar 14, 2024
April 87.1°F — Apr 30, 2007 14.0°F — Apr 7, 2018 4.02 in — Apr 18, 2013
May 96.1°F — May 28, 2018 27.0°F — May 4, 2011 4.60 in — May 26, 2011
June 96.1°F — Jun 29, 2012 43.0°F — Jun 1, 2012 3.22 in — Jun 25, 2021
July 102.0°F — Jul 24, 2012 48.0°F — Jul 20, 2009 3.35 in — Jul 11, 2021
August 99.0°F — Aug 8, 2012 44.1°F — Aug 31, 2009 2.83 in — Aug 7, 2023
September 97.0°F — Sep 10, 2013 30.9°F — Sep 24, 2012 4.57 in — Sep 28, 2019
October 91.0°F — Oct 3, 2006 18.0°F — Oct 31, 2006 2.88 in — Oct 25, 2021
November 75.9°F — Nov 2, 2016 -4.0°F — Nov 13, 2019 2.34 in — Nov 29, 2006
December 73.0°F — Dec 16, 2021 -15.0°F — Dec 23, 2022 1.36 in — Dec 25, 2009

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