All-time weather records — Alamosa, CO

Record high
93.9°F
June 28, 2013
Record low
-34.1°F
January 4, 2013
Wettest day
1.39 in
September 9, 2020

Climate change signal in Alamosa

68%

of Alamosa's all-time daily heat records were set in the last decade (249 of 366 records since 2015).

26.2%

of all-time daily cold records were set in the last decade (96 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
43
148
2010s
168
162
2020s
155
56

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 2005, the latest in 2026. Period of observation: 2005-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 59.0°F — Jan 10, 2018 -34.1°F — Jan 4, 2013 0.54 in — Jan 6, 2017
February 66.0°F — Feb 4, 2025 -31.0°F — Feb 3, 2011 0.66 in — Feb 23, 2015
March 73.0°F — Mar 28, 2022 -5.1°F — Mar 14, 2006 0.79 in — Mar 25, 2007
April 78.1°F — Apr 24, 2012 5.0°F — Apr 6, 2023 0.54 in — Apr 13, 2009
May 84.0°F — May 30, 2020 10.9°F — May 3, 2011 0.93 in — May 19, 2015
June 93.9°F — Jun 28, 2013 24.1°F — Jun 9, 2008 0.75 in — Jun 27, 2022
July 93.0°F — Jul 12, 2020 33.1°F — Jul 1, 2020 1.22 in — Jul 19, 2007
August 93.0°F — Aug 20, 2020 28.9°F — Aug 9, 2009 0.77 in — Aug 2, 2013
September 91.0°F — Sep 7, 2020 19.9°F — Sep 28, 2013 1.39 in — Sep 9, 2020
October 82.9°F — Oct 1, 2024 1.0°F — Oct 27, 2012 0.97 in — Oct 19, 2024
November 70.0°F — Nov 4, 2025 -20.9°F — Nov 30, 2006 1.07 in — Nov 25, 2013
December 63.0°F — Dec 4, 2010 -33.0°F — Dec 29, 2007 0.35 in — Dec 23, 2016

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