All-time weather records — Oreana, IL

Record high
104.0°F
July 5, 2012
Record low
-15.9°F
January 30, 2019
Wettest day
4.99 in
September 14, 2008

Climate change signal in Oreana

39.3%

of Oreana's all-time daily heat records were set in the last decade (144 of 366 records since 2015).

36.9%

of all-time daily cold records were set in the last decade (135 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
124
153
2010s
149
141
2020s
93
72

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 2001, the latest in 2026. Period of observation: 2000-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 68.0°F — Jan 7, 2008 -15.9°F — Jan 30, 2019 1.45 in — Jan 11, 2020
February 77.0°F — Feb 27, 2024 -9.8°F — Feb 11, 2014 2.87 in — Feb 24, 2001
March 88.0°F — Mar 26, 2026 -8.9°F — Mar 6, 2015 2.04 in — Mar 30, 2022
April 88.0°F — Apr 30, 2007 12.2°F — Apr 2, 2018 2.39 in — Apr 18, 2013
May 97.0°F — May 28, 2018 28.9°F — May 3, 2005 3.71 in — May 12, 2002
June 102.9°F — Jun 29, 2012 -0.8°F — Jun 15, 2007 4.63 in — Jun 3, 2008
July 104.0°F — Jul 5, 2012 39.0°F — Jul 6, 2007 3.03 in — Jul 24, 2010
August 100.0°F — Aug 12, 2007 -0.8°F — Aug 11, 2010 3.76 in — Aug 3, 2022
September 100.9°F — Sep 2, 2011 0.1°F — Sep 26, 2008 4.99 in — Sep 14, 2008
October 93.0°F — Oct 7, 2007 23.2°F — Oct 21, 2018 2.49 in — Oct 24, 2021
November 80.1°F — Nov 1, 2016 5.2°F — Nov 12, 2019 2.98 in — Nov 4, 2024
December 72.0°F — Dec 3, 2012 -14.1°F — Dec 14, 2025 2.76 in — Dec 26, 2015

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