All-time weather records — Shelby, MT

Record high
102.9°F
August 11, 2018
Record low
-44.0°F
January 20, 1954
Wettest day
2.46 in
August 9, 2021

Climate change signal in Shelby

32.8%

of Shelby's all-time daily heat records were set in the last decade (120 of 366 records since 2015).

18.3%

of all-time daily cold records were set in the last decade (67 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 #
1950s
76
141
1990s
45
32
2000s
104
84
2010s
74
80
2020s
67
29

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 1950, the latest in 2026. Period of observation: 1950-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 69.1°F — Jan 27, 2015 -44.0°F — Jan 20, 1954 0.90 in — Jan 11, 2013
February 69.1°F — Feb 6, 2026 -36.9°F — Feb 2, 1996 0.79 in — Feb 4, 2024
March 78.1°F — Mar 30, 2004 -36.9°F — Mar 8, 1951 0.75 in — Mar 11, 2023
April 86.0°F — Apr 30, 1952 -9.0°F — Apr 3, 2018 1.28 in — Apr 15, 2016
May 91.0°F — May 24, 2001 12.0°F — May 2, 1954 1.70 in — May 22, 2002
June 97.0°F — Jun 15, 2021 24.1°F — Jun 2, 2001 2.16 in — Jun 24, 2018
July 102.0°F — Jul 6, 2007 36.0°F — Jul 13, 1952 1.25 in — Jul 28, 2025
August 102.9°F — Aug 11, 2018 30.0°F — Aug 19, 1950 2.46 in — Aug 9, 2021
September 96.1°F — Sep 2, 1998 16.0°F — Sep 19, 1957 1.86 in — Sep 17, 1996
October 89.1°F — Oct 1, 2011 -11.9°F — Oct 25, 2020 1.35 in — Oct 6, 2011
November 73.9°F — Nov 8, 2004 -31.0°F — Nov 17, 1955 0.87 in — Nov 8, 2020
December 64.9°F — Dec 27, 1999 -36.0°F — Dec 26, 1996 0.56 in — Dec 29, 1996

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