All-time weather records — Roundup, MT

Record high
111.0°F
July 14, 2002
Record low
-52.1°F
February 15, 1936
Wettest day
3.38 in
August 23, 2014

Climate change signal in Roundup

6.6%

of Roundup's all-time daily heat records were set in the last decade (24 of 366 records since 2015).

3%

of all-time daily cold records were set in the last decade (11 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
12
37
1920s
6
32
1930s
52
45
1940s
56
32
1950s
35
42
1960s
35
47
1970s
30
34
1980s
41
30
1990s
17
22
2000s
46
22
2010s
36
23

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 1914, the latest in 2017. Period of observation: 1914-2019.

Records by month

Month Hottest day Coldest day Wettest day
January 70.0°F — Jan 11, 1953 -41.1°F — Jan 24, 1969 0.75 in — Jan 25, 1918
February 75.0°F — Feb 28, 1932 -52.1°F — Feb 15, 1936 0.73 in — Feb 2, 1966
March 82.0°F — Mar 31, 2004 -33.0°F — Mar 10, 1932 1.73 in — Mar 2, 1967
April 91.0°F — Apr 20, 1980 -9.0°F — Apr 2, 1936 1.97 in — Apr 15, 1930
May 100.0°F — May 28, 1934 10.0°F — May 3, 1954 2.30 in — May 12, 1942
June 106.0°F — Jun 27, 2002 30.9°F — Jun 3, 1950 2.58 in — Jun 9, 1968
July 111.0°F — Jul 14, 2002 33.1°F — Jul 24, 1991 2.35 in — Jul 21, 1955
August 108.0°F — Aug 5, 1961 30.0°F — Aug 25, 1992 3.38 in — Aug 23, 2014
September 102.0°F — Sep 1, 1983 15.1°F — Sep 30, 1985 1.91 in — Sep 12, 1978
October 95.0°F — Oct 3, 1943 -9.9°F — Oct 25, 1919 3.00 in — Oct 22, 1975
November 78.1°F — Nov 23, 1933 -36.0°F — Nov 16, 1959 0.64 in — Nov 1, 1957
December 70.0°F — Dec 27, 1980 -44.0°F — Dec 24, 1983 3.00 in — Dec 10, 2000

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