All-time weather records — Westminster, CO

Record high
109.9°F
August 2, 2008
Record low
-34.1°F
April 4, 1987
Wettest day
2.45 in
August 24, 1992

Climate change signal in Westminster

41%

of Westminster's all-time daily heat records were set in the last decade (150 of 366 records since 2015).

18%

of all-time daily cold records were set in the last decade (66 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 #
1980s
9
110
1990s
44
105
2000s
137
56
2010s
79
51
2020s
97
44

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 1986, the latest in 2026. Period of observation: 1984-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 77.0°F — Jan 2, 1997 -15.0°F — Jan 31, 1985 0.68 in — Jan 12, 2019
February 82.9°F — Feb 11, 2017 -29.9°F — Feb 1, 1987 0.99 in — Feb 4, 2024
March 93.9°F — Mar 26, 2026 -8.0°F — Mar 24, 1997 2.00 in — Mar 27, 2003
April 90.0°F — Apr 13, 2025 -34.1°F — Apr 4, 1987 2.27 in — Apr 24, 1997
May 100.9°F — May 29, 2003 -2.0°F — May 7, 1988 2.20 in — May 29, 1990
June 105.1°F — Jun 29, 2018 30.0°F — Jun 15, 1987 1.55 in — Jun 12, 2010
July 108.0°F — Jul 22, 2005 19.0°F — Jul 11, 1986 2.15 in — Jul 24, 2004
August 109.9°F — Aug 2, 2008 41.0°F — Aug 6, 1986 2.45 in — Aug 24, 1992
September 102.0°F — Sep 3, 2019 18.0°F — Sep 29, 1985 1.88 in — Sep 12, 2013
October 95.0°F — Oct 16, 2001 3.9°F — Oct 31, 2019 1.57 in — Oct 4, 1984
November 84.0°F — Nov 3, 2025 -32.1°F — Nov 15, 1986 1.05 in — Nov 26, 2019
December 82.0°F — Dec 23, 2025 -24.0°F — Dec 22, 1990 1.49 in — Dec 21, 2006

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