All-time weather records — Circle, MT

Record high
109.0°F
July 14, 2002
Record low
-45.9°F
December 21, 1989
Wettest day
3.50 in
June 18, 1964

Climate change signal in Circle

21%

of Circle's all-time daily heat records were set in the last decade (77 of 366 records since 2015).

12.8%

of all-time daily cold records were set in the last decade (47 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
38
71
1970s
35
70
1980s
96
55
1990s
52
52
2000s
51
53
2010s
48
34
2020s
46
31

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 1963, the latest in 2026. Period of observation: 1963-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 64.9°F — Jan 24, 1981 -42.0°F — Jan 1, 2018 0.85 in — Jan 13, 2002
February 70.0°F — Feb 27, 1992 -43.1°F — Feb 18, 2025 0.69 in — Feb 17, 1979
March 82.9°F — Mar 31, 2004 -38.9°F — Mar 8, 1996 0.95 in — Mar 18, 2003
April 91.9°F — Apr 21, 1980 -6.0°F — Apr 1, 1967 2.80 in — Apr 18, 1992
May 100.9°F — May 23, 1980 17.1°F — May 3, 2005 2.27 in — May 10, 2011
June 107.1°F — Jun 5, 1988 27.0°F — Jun 2, 2009 3.50 in — Jun 18, 1964
July 109.0°F — Jul 14, 2002 35.1°F — Jul 3, 1967 2.30 in — Jul 5, 1964
August 109.0°F — Aug 7, 1983 27.0°F — Aug 31, 1994 1.70 in — Aug 15, 2009
September 105.1°F — Sep 2, 1983 15.1°F — Sep 21, 1995 2.34 in — Sep 25, 1986
October 93.9°F — Oct 2, 1997 -9.0°F — Oct 30, 1991 1.27 in — Oct 19, 1971
November 79.0°F — Nov 7, 1999 -31.0°F — Nov 24, 1993 0.67 in — Nov 1, 1974
December 68.0°F — Dec 1, 2021 -45.9°F — Dec 21, 1989 0.90 in — Dec 28, 2003

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