All-time weather records — Chester, MT

Record high
105.1°F
August 5, 1961
Record low
-56.9°F
January 25, 1950
Wettest day
3.10 in
July 13, 1970

Climate change signal in Chester

11.7%

of Chester's all-time daily heat records were set in the last decade (43 of 366 records since 2015).

9.3%

of all-time daily cold records were set in the last decade (34 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 #
1900s
18
39
1910s
43
49
1920s
1
1
1940s
40
29
1950s
43
51
1960s
43
51
1970s
22
29
1980s
43
31
1990s
32
26
2000s
30
17
2010s
19
28
2020s
32
15

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 1900, the latest in 2026. Period of observation: 1900-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 66.0°F — Jan 31, 1992 -56.9°F — Jan 25, 1950 0.82 in — Jan 31, 1911
February 73.9°F — Feb 27, 1992 -45.0°F — Feb 4, 2021 0.67 in — Feb 8, 2018
March 79.0°F — Mar 30, 2004 -38.0°F — Mar 8, 1951 1.87 in — Mar 24, 1908
April 88.0°F — Apr 20, 1980 -18.9°F — Apr 6, 1975 1.83 in — Apr 15, 2016
May 93.9°F — May 6, 1920 0.0°F — May 14, 2004 1.62 in — May 25, 1990
June 100.9°F — Jun 20, 1919 19.0°F — Jun 19, 1918 3.02 in — Jun 6, 1995
July 104.0°F — Jul 7, 2007 30.0°F — Jul 21, 1914 3.10 in — Jul 13, 1970
August 105.1°F — Aug 5, 1961 28.0°F — Aug 17, 1946 2.22 in — Aug 15, 1968
September 99.0°F — Sep 7, 2022 3.9°F — Sep 14, 1914 2.35 in — Sep 4, 1911
October 90.0°F — Oct 3, 1943 -18.9°F — Oct 27, 2019 1.78 in — Oct 3, 2017
November 77.0°F — Nov 3, 1914 -33.0°F — Nov 20, 1900 1.09 in — Nov 2, 2020
December 80.1°F — Dec 22, 1915 -52.1°F — Dec 24, 1983 0.70 in — Dec 13, 2025

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