All-time weather records — Bison, SD

Record high
1904.0°F
July 31, 1944
Record low
-42.0°F
February 10, 1939
Wettest day
3.66 in
September 8, 2013

Climate change signal in Bison

10.9%

of Bison's all-time daily heat records were set in the last decade (40 of 366 records since 2015).

6.8%

of all-time daily cold records were set in the last decade (25 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
3
46
1920s
5
1
1930s
72
39
1940s
31
38
1950s
33
50
1960s
25
44
1970s
25
34
1980s
31
46
1990s
34
27
2000s
47
8
2010s
39
13
2020s
21
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 1919, the latest in 2025. Period of observation: 1916-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 71.1°F — Jan 30, 1935 -38.0°F — Jan 13, 1917 2.00 in — Jan 27, 1944
February 71.1°F — Feb 1, 1992 -42.0°F — Feb 10, 1939 1.12 in — Feb 20, 2011
March 81.0°F — Mar 15, 2015 -27.9°F — Mar 1, 1980 2.40 in — Mar 27, 1950
April 91.9°F — Apr 21, 1980 -6.0°F — Apr 2, 1954 3.24 in — Apr 30, 1967
May 102.0°F — May 28, 1934 10.9°F — May 12, 1943 3.20 in — May 23, 1933
June 109.9°F — Jun 29, 2002 28.0°F — Jun 1, 1917 3.21 in — Jun 18, 2014
July 1904.0°F — Jul 31, 1944 37.0°F — Jul 1, 1945 2.55 in — Jul 16, 1993
August 107.1°F — Aug 22, 1960 33.1°F — Aug 18, 1950 3.32 in — Aug 12, 1999
September 107.1°F — Sep 3, 1960 18.0°F — Sep 26, 1942 3.66 in — Sep 8, 2013
October 107.1°F — Oct 15, 1996 -8.0°F — Oct 26, 1919 2.60 in — Oct 13, 2021
November 88.0°F — Nov 8, 1931 -26.0°F — Nov 23, 2003 1.43 in — Nov 6, 2008
December 69.1°F — Dec 4, 1979 -34.1°F — Dec 24, 1983 0.92 in — Dec 11, 2025

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