All-time weather records — Riverton, WY

Record high
104.0°F
July 1, 1990
Record low
-45.9°F
January 1, 1979
Wettest day
4.05 in
August 17, 1912

Climate change signal in Riverton

10.7%

of Riverton's all-time daily heat records were set in the last decade (39 of 366 records since 2015).

4.4%

of all-time daily cold records were set in the last decade (16 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 #
1900s
8
16
1910s
7
19
1920s
16
31
1930s
31
36
1940s
31
47
1950s
33
38
1960s
30
43
1970s
21
46
1980s
56
49
1990s
42
16
2000s
37
6
2010s
18
9
2020s
36
10

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 1907, the latest in 2026. Period of observation: 1907-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 72.0°F — Jan 7, 1994 -45.9°F — Jan 1, 1979 0.85 in — Jan 16, 1995
February 71.1°F — Feb 11, 1951 -45.0°F — Feb 8, 1936 0.59 in — Feb 24, 1935
March 84.0°F — Mar 26, 2026 -24.0°F — Mar 6, 1920 1.50 in — Mar 31, 2017
April 87.1°F — Apr 24, 2012 -18.0°F — Apr 2, 1936 1.53 in — Apr 26, 1971
May 96.1°F — May 31, 1984 15.1°F — May 1, 1909 3.53 in — May 8, 1921
June 102.0°F — Jun 28, 1970 26.1°F — Jun 3, 1951 2.20 in — Jun 3, 1993
July 104.0°F — Jul 1, 1990 30.0°F — Jul 7, 1986 1.90 in — Jul 24, 1923
August 102.9°F — Aug 1, 1988 28.9°F — Aug 31, 1908 4.05 in — Aug 17, 1912
September 98.1°F — Sep 5, 2022 9.0°F — Sep 25, 1926 2.14 in — Sep 27, 1923
October 90.0°F — Oct 1, 1980 -13.0°F — Oct 30, 2019 2.00 in — Oct 6, 1912
November 73.0°F — Nov 1, 1999 -27.9°F — Nov 23, 1985 1.31 in — Nov 24, 2023
December 64.9°F — Dec 2, 1995 -45.9°F — Dec 23, 1983 0.69 in — Dec 2, 1982

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