All-time weather records — Hysham, MT

Record high
111.0°F
July 28, 1947
Record low
-47.9°F
January 20, 1954
Wettest day
3.20 in
May 30, 2013

Climate change signal in Hysham

12.8%

of Hysham's all-time daily heat records were set in the last decade (47 of 366 records since 2015).

7.4%

of all-time daily cold records were set in the last decade (27 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 #
1940s
34
31
1950s
47
86
1960s
62
58
1970s
29
40
1980s
76
52
1990s
37
39
2000s
27
23
2010s
23
17
2020s
31
20

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 1946, the latest in 2026. Period of observation: 1945-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 72.0°F — Jan 31, 1992 -47.9°F — Jan 20, 1954 1.02 in — Jan 27, 1971
February 75.0°F — Feb 27, 1992 -38.0°F — Feb 7, 1971 0.70 in — Feb 20, 1993
March 84.9°F — Mar 28, 2025 -36.0°F — Mar 3, 2019 1.25 in — Mar 30, 2006
April 97.0°F — Apr 26, 1952 3.9°F — Apr 10, 2013 1.65 in — Apr 28, 1970
May 100.0°F — May 22, 1980 14.0°F — May 3, 1954 3.20 in — May 30, 2013
June 107.1°F — Jun 16, 2021 28.9°F — Jun 13, 1969 1.81 in — Jun 21, 1957
July 111.0°F — Jul 28, 1947 37.0°F — Jul 4, 1972 2.27 in — Jul 3, 1993
August 108.0°F — Aug 3, 1961 32.0°F — Aug 25, 1992 2.90 in — Aug 24, 2014
September 105.1°F — Sep 1, 1983 19.0°F — Sep 30, 1985 3.05 in — Sep 10, 1961
October 93.0°F — Oct 4, 1980 -9.0°F — Oct 30, 1991 1.60 in — Oct 22, 1980
November 79.0°F — Nov 12, 1999 -31.0°F — Nov 23, 1985 1.50 in — Nov 1, 1957
December 70.0°F — Dec 15, 1980 -45.9°F — Dec 22, 1989 0.80 in — Dec 3, 2013

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