All-time weather records — Ennis, MT

Record high
100.9°F
August 3, 2024
Record low
-43.1°F
January 17, 1930
Wettest day
2.65 in
August 12, 1969

Climate change signal in Ennis

20.5%

of Ennis's all-time daily heat records were set in the last decade (75 of 366 records since 2015).

9.6%

of all-time daily cold records were set in the last decade (35 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
34
13
1920s
28
33
1930s
29
68
1940s
14
36
1950s
23
23
1960s
25
31
1970s
13
26
1980s
35
33
1990s
34
24
2000s
43
27
2010s
30
35
2020s
58
17

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 1918, the latest in 2026. Period of observation: 1918-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 61.0°F — Jan 22, 1981 -43.1°F — Jan 17, 1930 1.20 in — Jan 19, 1937
February 66.0°F — Feb 6, 2026 -43.1°F — Feb 9, 1933 0.57 in — Feb 10, 1999
March 79.0°F — Mar 20, 2026 -34.1°F — Mar 4, 2019 1.04 in — Mar 29, 1967
April 84.9°F — Apr 27, 1987 -7.1°F — Apr 5, 1936 1.55 in — Apr 26, 1943
May 93.9°F — May 28, 1919 12.0°F — May 9, 2002 1.75 in — May 18, 1944
June 99.0°F — Jun 30, 2015 24.1°F — Jun 3, 1951 2.14 in — Jun 26, 1959
July 100.0°F — Jul 11, 1919 28.9°F — Jul 12, 2008 1.90 in — Jul 3, 1993
August 100.9°F — Aug 3, 2024 27.0°F — Aug 28, 1960 2.65 in — Aug 12, 1969
September 98.1°F — Sep 4, 2022 10.0°F — Sep 29, 1985 1.34 in — Sep 9, 1950
October 90.0°F — Oct 4, 2010 -11.9°F — Oct 30, 1991 2.12 in — Oct 15, 1935
November 72.0°F — Nov 1, 1965 -27.0°F — Nov 16, 1959 0.94 in — Nov 9, 2012
December 68.0°F — Dec 5, 1939 -35.0°F — Dec 31, 1927 0.68 in — Dec 25, 1996

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