All-time weather records — Grass Range, MT

Record high
107.1°F
June 27, 1936
Record low
-44.0°F
February 15, 1936
Wettest day
70.13 in
July 1, 1953

Climate change signal in Grass Range

6.6%

of Grass Range's all-time daily heat records were set in the last decade (24 of 366 records since 2015).

4.4%

of all-time daily cold records were set in the last decade (16 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 #
1910s
5
7
1930s
64
37
1940s
29
34
1950s
33
71
1960s
45
70
1970s
38
32
1980s
86
37
1990s
25
31
2000s
16
14
2010s
9
22
2020s
16
11

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 1914, the latest in 2026. Period of observation: 1914-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 73.9°F — Jan 22, 1981 -40.0°F — Jan 24, 1969 0.92 in — Jan 1, 1991
February 73.0°F — Feb 27, 1992 -44.0°F — Feb 15, 1936 0.60 in — Feb 5, 2018
March 80.1°F — Mar 29, 1978 -32.1°F — Mar 3, 1960 0.99 in — Mar 25, 1995
April 93.9°F — Apr 28, 1987 -17.0°F — Apr 11, 1940 1.64 in — Apr 23, 1961
May 97.0°F — May 22, 1980 6.1°F — May 2, 1954 2.62 in — May 7, 1988
June 107.1°F — Jun 27, 1936 26.1°F — Jun 3, 2011 2.68 in — Jun 9, 1968
July 106.0°F — Jul 18, 1936 18.0°F — Jul 14, 1942 70.13 in — Jul 1, 1953
August 106.0°F — Aug 10, 1935 28.9°F — Aug 25, 1992 6.05 in — Aug 23, 2014
September 100.0°F — Sep 4, 1950 15.1°F — Sep 30, 1985 2.37 in — Sep 18, 2024
October 90.0°F — Oct 3, 1987 -9.0°F — Oct 29, 1991 2.57 in — Oct 3, 2016
November 84.9°F — Nov 5, 1975 -26.0°F — Nov 13, 1955 0.87 in — Nov 3, 2015
December 78.1°F — Dec 5, 1939 -38.9°F — Dec 24, 1983 1.00 in — Dec 24, 1984

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