All-time weather records — Deer Lodge, MT

Record high
100.9°F
July 15, 2002
Record low
-40.0°F
January 13, 2024
Wettest day
2.13 in
July 31, 1997

Climate change signal in Deer Lodge

17.5%

of Deer Lodge's all-time daily heat records were set in the last decade (64 of 366 records since 2015).

13.7%

of all-time daily cold records were set in the last decade (50 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 #
1950s
1
7
1960s
61
76
1970s
48
56
1980s
60
69
1990s
56
48
2000s
70
44
2010s
19
37
2020s
51
29

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 1959, the latest in 2026. Period of observation: 1959-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 62.1°F — Jan 26, 2015 -40.0°F — Jan 13, 2024 2.00 in — Jan 4, 2018
February 69.1°F — Feb 26, 1995 -36.9°F — Feb 3, 1989 1.09 in — Feb 25, 2002
March 73.0°F — Mar 28, 1986 -29.0°F — Mar 3, 2019 1.29 in — Mar 17, 1992
April 82.9°F — Apr 30, 1992 -8.0°F — Apr 8, 1982 1.00 in — Apr 2, 2018
May 90.0°F — May 29, 2003 7.0°F — May 2, 1967 1.44 in — May 25, 1980
June 96.1°F — Jun 14, 2021 21.9°F — Jun 3, 1987 1.34 in — Jun 4, 2001
July 100.9°F — Jul 15, 2002 19.9°F — Jul 26, 1997 2.13 in — Jul 31, 1997
August 100.0°F — Aug 4, 1961 7.0°F — Aug 31, 1995 0.91 in — Aug 28, 1991
September 98.1°F — Sep 4, 2022 -6.0°F — Sep 7, 1984 1.53 in — Sep 20, 1968
October 87.1°F — Oct 1, 1992 -15.0°F — Oct 30, 2006 0.80 in — Oct 13, 1975
November 73.0°F — Nov 2, 2025 -38.0°F — Nov 13, 1959 1.50 in — Nov 24, 2021
December 66.0°F — Dec 2, 2021 -40.0°F — Dec 22, 2022 1.03 in — Dec 3, 2025

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