All-time weather records — Great Falls, MT

Record high
107.1°F
July 25, 1933
Record low
-49.0°F
February 15, 1936
Wettest day
3.36 in
June 23, 1907

Climate change signal in Great Falls

13.1%

of Great Falls's all-time daily heat records were set in the last decade (48 of 366 records since 2015).

2.2%

of all-time daily cold records were set in the last decade (8 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 #
1890s
53
68
1900s
17
40
1910s
66
87
1920s
34
57
1930s
71
55
1950s
36
25
2000s
22
14
2010s
53
17
2020s
14
3

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 1892, the latest in 2026. Period of observation: 1892-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 86.0°F — Jan 25, 1892 -44.0°F — Jan 10, 1909 0.56 in — Jan 24, 1916
February 71.1°F — Feb 6, 2026 -49.0°F — Feb 15, 1936 0.93 in — Feb 12, 1897
March 78.1°F — Mar 31, 2015 -32.1°F — Mar 10, 1932 1.09 in — Mar 13, 1896
April 88.0°F — Apr 25, 1897 -9.9°F — Apr 2, 1936 1.59 in — Apr 9, 2017
May 100.0°F — May 28, 1919 12.0°F — May 2, 1954 2.83 in — May 25, 1953
June 102.0°F — Jun 21, 1900 32.0°F — Jun 1, 1919 3.36 in — Jun 23, 1907
July 107.1°F — Jul 25, 1933 35.1°F — Jul 1, 1894 1.77 in — Jul 15, 2012
August 102.9°F — Aug 1, 1955 34.0°F — Aug 24, 1910 2.72 in — Aug 21, 1933
September 97.0°F — Sep 6, 1893 10.0°F — Sep 24, 1926 1.51 in — Sep 19, 1925
October 90.0°F — Oct 5, 1895 -9.9°F — Oct 27, 1919 2.51 in — Oct 3, 2015
November 75.0°F — Nov 5, 2010 -25.1°F — Nov 18, 1903 1.14 in — Nov 8, 1906
December 64.9°F — Dec 21, 1933 -38.0°F — Dec 9, 1919 0.70 in — Dec 30, 1917

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