All-time weather records — Casper, WY

Record high
104.0°F
July 14, 2005
Record low
-36.0°F
February 23, 2010
Wettest day
2.60 in
May 6, 2007

Climate change signal in Casper

41.5%

of Casper's all-time daily heat records were set in the last decade (152 of 366 records since 2015).

45.9%

of all-time daily cold records were set in the last decade (168 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
160
123
2010s
107
157
2020s
99
86

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: 2001-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 62.1°F — Jan 21, 2005 -29.9°F — Jan 12, 2024 0.71 in — Jan 22, 2018
February 63.0°F — Feb 7, 2026 -36.0°F — Feb 23, 2010 0.73 in — Mar 1, 2004
March 82.0°F — Mar 26, 2026 -18.0°F — Mar 10, 2022 1.51 in — Mar 30, 2016
April 84.9°F — Apr 25, 2012 -9.0°F — Apr 2, 2008 1.33 in — Apr 25, 2016
May 93.0°F — May 30, 2003 10.0°F — May 8, 2014 2.60 in — May 6, 2007
June 100.9°F — Jun 15, 2021 24.1°F — Jun 24, 2018 2.11 in — Jun 16, 2023
July 104.0°F — Jul 14, 2005 35.1°F — Jul 26, 2015 1.83 in — Jul 26, 2005
August 100.9°F — Aug 14, 2003 35.1°F — Aug 23, 2016 1.47 in — Aug 12, 2022
September 97.0°F — Sep 5, 2022 5.0°F — Sep 21, 2017 1.17 in — Sep 17, 2025
October 86.0°F — Oct 2, 2011 -9.0°F — Oct 30, 2019 1.52 in — Oct 4, 2013
November 72.0°F — Nov 2, 2014 -20.9°F — Nov 14, 2014 0.44 in — Nov 27, 2004
December 66.0°F — Dec 3, 2021 -34.1°F — Dec 22, 2022 0.87 in — Dec 15, 2015

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