All-time weather records — Dillon, MT

Record high
102.0°F
July 12, 2002
Record low
-40.0°F
January 13, 2024
Wettest day
2.40 in
September 3, 1901

Climate change signal in Dillon

10.4%

of Dillon's all-time daily heat records were set in the last decade (38 of 366 records since 2015).

3.6%

of all-time daily cold records were set in the last decade (13 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 #
1890s
·
17
1900s
32
46
1910s
32
38
1920s
17
16
1930s
30
30
1940s
21
34
1950s
42
41
1960s
34
38
1970s
15
26
1980s
47
28
1990s
35
15
2000s
20
18
2010s
12
12
2020s
29
7

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: 1895-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 60.1°F — Jan 31, 1953 -40.0°F — Jan 13, 2024 1.10 in — Jan 9, 1909
February 64.9°F — Feb 4, 1984 -40.0°F — Feb 9, 1933 1.30 in — Feb 5, 2019
March 75.0°F — Mar 19, 2026 -26.0°F — Mar 3, 1896 2.00 in — Mar 31, 2026
April 84.0°F — Apr 25, 1946 -2.9°F — Apr 8, 1982 2.00 in — Apr 1, 2026
May 91.0°F — May 19, 1954 15.1°F — May 2, 1954 2.25 in — May 7, 1896
June 98.1°F — Jun 28, 2015 23.0°F — Jun 16, 2001 1.70 in — Jun 24, 1958
July 102.0°F — Jul 12, 2002 30.0°F — Jul 2, 1955 1.52 in — Jul 22, 2008
August 100.0°F — Aug 12, 1940 25.0°F — Aug 25, 1910 1.31 in — Aug 26, 1905
September 93.9°F — Sep 4, 1998 -36.0°F — Sep 21, 1936 2.40 in — Sep 3, 1901
October 86.0°F — Oct 1, 1992 -13.0°F — Oct 30, 1935 1.75 in — Oct 17, 2024
November 79.0°F — Nov 5, 1908 -31.0°F — Nov 16, 1955 1.51 in — Nov 5, 1918
December 64.9°F — Dec 9, 1939 -36.9°F — Dec 22, 1990 1.00 in — Dec 5, 2025

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