All-time weather records — Lone Tree, CO

Record high
100.9°F
June 28, 2018
Record low
-16.8°F
February 5, 2014
Wettest day
3.35 in
May 11, 2023

Climate change signal in Lone Tree

47%

of Lone Tree's all-time daily heat records were set in the last decade (172 of 366 records since 2015).

27.9%

of all-time daily cold records were set in the last decade (102 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 #
1990s
19
39
2000s
125
156
2010s
123
114
2020s
99
57

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 1998, the latest in 2026. Period of observation: 1998-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 73.0°F — Jan 27, 2015 -11.7°F — Jan 15, 2024 0.43 in — Jan 21, 2007
February 78.1°F — Feb 10, 2017 -16.8°F — Feb 5, 2014 1.33 in — Feb 3, 2012
March 86.0°F — Mar 21, 2026 -9.0°F — Mar 2, 2002 2.05 in — Mar 23, 2016
April 84.9°F — Apr 24, 2012 2.1°F — Apr 10, 2013 2.23 in — Apr 24, 2007
May 93.0°F — May 29, 2003 -2.7°F — May 28, 2015 3.35 in — May 11, 2023
June 100.9°F — Jun 28, 2018 25.2°F — Jun 15, 2018 2.33 in — Jun 22, 2023
July 100.9°F — Jul 20, 2005 37.0°F — Jul 11, 2007 1.85 in — Jul 4, 2010
August 100.0°F — Aug 1, 2008 37.9°F — Aug 26, 2014 3.27 in — Aug 18, 2004
September 98.1°F — Sep 2, 2019 26.1°F — Sep 29, 1999 2.20 in — Sep 12, 2013
October 87.1°F — Oct 2, 2024 2.1°F — Oct 27, 2020 0.92 in — Oct 26, 2006
November 88.0°F — Nov 16, 2012 -8.9°F — Nov 13, 2014 0.60 in — Nov 2, 2011
December 75.9°F — Dec 22, 2025 -15.9°F — Dec 22, 2022 0.88 in — Dec 20, 2006

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