All-time weather records — Forsyth, MT

Record high
109.9°F
July 14, 2002
Record low
-44.0°F
December 22, 1989
Wettest day
3.49 in
August 2, 1998

Climate change signal in Forsyth

19.4%

of Forsyth's all-time daily heat records were set in the last decade (71 of 366 records since 2015).

14.2%

of all-time daily cold records were set in the last decade (52 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 #
1970s
24
43
1980s
91
94
1990s
89
82
2000s
73
70
2010s
46
43
2020s
43
34

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 1976, the latest in 2026. Period of observation: 1975-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 70.0°F — Jan 31, 1992 -38.0°F — Jan 30, 1996 0.56 in — Jan 20, 2012
February 73.0°F — Feb 24, 1995 -38.0°F — Feb 2, 1996 0.90 in — Feb 25, 2000
March 86.0°F — Mar 31, 2004 -31.0°F — Mar 3, 2019 1.50 in — Mar 28, 2007
April 91.0°F — Apr 20, 1980 1.0°F — Apr 21, 2008 1.99 in — Apr 7, 2024
May 99.0°F — May 22, 1980 19.0°F — May 13, 2004 2.88 in — May 10, 2016
June 108.0°F — Jun 15, 2021 34.0°F — Jun 1, 1979 1.86 in — Jun 6, 1982
July 109.9°F — Jul 14, 2002 41.0°F — Jul 12, 1987 2.49 in — Jul 3, 1993
August 105.1°F — Aug 7, 1995 32.0°F — Aug 25, 1992 3.49 in — Aug 2, 1998
September 105.1°F — Sep 7, 2022 19.0°F — Sep 30, 1985 2.80 in — Sep 11, 2019
October 93.0°F — Oct 1, 2005 -11.0°F — Oct 30, 1991 1.27 in — Oct 4, 2025
November 82.0°F — Nov 12, 1999 -27.0°F — Nov 21, 1977 1.04 in — Nov 9, 1978
December 70.0°F — Dec 1, 1995 -44.0°F — Dec 22, 1989 1.08 in — Dec 30, 2004

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