All-time weather records — Harlowton, MT

Record high
102.9°F
July 12, 2002
Record low
-41.1°F
January 12, 2024
Wettest day
2.44 in
June 6, 1997

Climate change signal in Harlowton

18%

of Harlowton's all-time daily heat records were set in the last decade (66 of 366 records since 2015).

10.1%

of all-time daily cold records were set in the last decade (37 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 #
1940s
13
18
1950s
44
71
1960s
36
78
1970s
21
37
1980s
67
42
1990s
60
31
2000s
43
27
2010s
42
42
2020s
40
20

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 1948, the latest in 2026. Period of observation: 1948-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 69.1°F — Jan 22, 1981 -41.1°F — Jan 12, 2024 0.79 in — Jan 26, 1975
February 73.9°F — Feb 26, 1950 -38.9°F — Feb 13, 1949 0.97 in — Feb 28, 1953
March 77.0°F — Mar 30, 2004 -29.0°F — Mar 3, 2019 0.70 in — Mar 7, 2014
April 87.1°F — Apr 25, 1952 -6.0°F — Apr 13, 2022 1.70 in — Apr 28, 1950
May 91.0°F — May 19, 1954 3.9°F — May 12, 1953 1.97 in — May 30, 1967
June 99.0°F — Jun 26, 2012 24.1°F — Jun 25, 1953 2.44 in — Jun 6, 1997
July 102.9°F — Jul 12, 2002 30.9°F — Jul 20, 1990 1.31 in — Jul 3, 1993
August 100.9°F — Aug 5, 1961 24.1°F — Aug 25, 1992 1.48 in — Aug 30, 2010
September 100.0°F — Sep 7, 2022 10.0°F — Sep 30, 1950 2.00 in — Sep 18, 2024
October 90.0°F — Oct 1, 1992 -8.0°F — Oct 30, 1991 1.24 in — Oct 23, 2022
November 78.1°F — Nov 4, 1949 -29.0°F — Nov 13, 1959 1.00 in — Nov 3, 2017
December 66.0°F — Dec 2, 2021 -38.9°F — Dec 17, 1964 0.90 in — Dec 23, 1955

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