All-time weather records — Eureka, MT

Record high
106.0°F
June 29, 2021
Record low
-50.1°F
December 30, 1968
Wettest day
1.88 in
September 9, 2019

Climate change signal in Eureka

18.3%

of Eureka's all-time daily heat records were set in the last decade (67 of 366 records since 2015).

6.6%

of all-time daily cold records were set in the last decade (24 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 #
1960s
81
117
1970s
43
94
1980s
57
51
1990s
59
32
2000s
48
42
2010s
41
13
2020s
37
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 1960, the latest in 2025. Period of observation: 1960-2025.

Records by month

Month Hottest day Coldest day Wettest day
January 63.0°F — Jan 24, 2005 -35.0°F — Jan 11, 1963 0.69 in — Jan 24, 1981
February 66.0°F — Feb 24, 1995 -29.9°F — Feb 2, 1996 0.87 in — Feb 6, 2017
March 78.1°F — Mar 30, 2004 -23.1°F — Mar 3, 2019 0.74 in — Mar 16, 2015
April 89.1°F — Apr 28, 1987 8.1°F — Apr 1, 1975 1.03 in — Apr 24, 1998
May 93.9°F — May 23, 2001 21.9°F — May 1, 1973 1.50 in — May 22, 2002
June 106.0°F — Jun 29, 2021 27.0°F — Jun 11, 1973 1.71 in — Jun 20, 2013
July 105.1°F — Jul 24, 2006 30.0°F — Jul 3, 1962 1.29 in — Jul 22, 1987
August 106.0°F — Aug 10, 2018 30.0°F — Aug 19, 1973 1.79 in — Aug 30, 2023
September 98.1°F — Sep 1, 1967 18.0°F — Sep 23, 2000 1.88 in — Sep 9, 2019
October 86.0°F — Oct 7, 1980 0.0°F — Oct 30, 2002 1.01 in — Oct 2, 2018
November 68.0°F — Nov 12, 1999 -23.1°F — Nov 28, 1985 1.15 in — Nov 12, 1989
December 59.0°F — Dec 1, 2021 -50.1°F — Dec 30, 1968 1.44 in — Dec 9, 2015

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