All-time weather records — Sidney, MT

Record high
109.9°F
July 27, 1917
Record low
-47.0°F
January 11, 1912
Wettest day
20.21 in
October 24, 1954

Climate change signal in Sidney

23.5%

of Sidney's all-time daily heat records were set in the last decade (86 of 366 records since 2015).

7.9%

of all-time daily cold records were set in the last decade (29 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
23
73
1920s
14
9
1940s
3
5
1950s
15
67
1960s
24
71
1970s
19
38
1980s
69
28
1990s
52
32
2000s
45
10
2010s
30
14
2020s
72
19

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 1910, the latest in 2026. Period of observation: 1910-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 61.0°F — Jan 5, 2012 -47.0°F — Jan 11, 1912 0.70 in — Jan 16, 1995
February 68.0°F — Feb 27, 1992 -44.0°F — Feb 2, 1917 0.83 in — Feb 25, 1998
March 81.0°F — Mar 26, 1999 -29.0°F — Mar 2, 1916 1.48 in — Mar 17, 2003
April 95.0°F — Apr 20, 1980 -17.0°F — Apr 1, 1975 2.05 in — Apr 18, 2006
May 102.0°F — May 22, 1980 16.0°F — May 3, 2005 2.42 in — May 10, 2011
June 105.1°F — Jun 7, 1988 28.0°F — Jun 8, 1915 2.97 in — Jun 18, 1973
July 109.9°F — Jul 27, 1917 34.0°F — Jul 12, 1921 2.74 in — Jul 1, 2009
August 107.1°F — Aug 12, 2018 30.0°F — Aug 31, 1994 2.94 in — Aug 24, 1914
September 100.9°F — Sep 2, 2023 15.1°F — Sep 30, 1961 2.92 in — Sep 8, 1991
October 93.0°F — Oct 1, 2025 -7.1°F — Oct 26, 1919 20.21 in — Oct 24, 1954
November 77.0°F — Nov 12, 1999 -24.0°F — Nov 24, 1996 1.60 in — Nov 1, 2000
December 68.0°F — Dec 4, 1979 -40.0°F — Dec 23, 1983 1.15 in — Dec 27, 2016

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