All-time weather records — Interior, SD

Record high
114.1°F
July 15, 2006
Record low
-31.0°F
February 2, 1996
Wettest day
3.95 in
May 5, 2007

Climate change signal in Interior

18.9%

of Interior's all-time daily heat records were set in the last decade (69 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 #
1950s
30
25
1960s
60
66
1970s
38
63
1980s
49
68
1990s
51
59
2000s
50
34
2010s
42
31
2020s
46
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 1955, the latest in 2026. Period of observation: 1949-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 71.1°F — Jan 5, 2012 -27.9°F — Jan 19, 1963 0.80 in — Jan 31, 1971
February 75.0°F — Feb 10, 1962 -31.0°F — Feb 2, 1996 1.10 in — Feb 27, 1987
March 84.9°F — Mar 25, 2026 -23.1°F — Mar 4, 1960 2.07 in — Mar 8, 2000
April 93.9°F — Apr 21, 1980 0.0°F — Apr 28, 1984 3.07 in — Apr 19, 2000
May 102.0°F — May 27, 1969 19.9°F — May 1, 1967 3.95 in — May 5, 2007
June 109.0°F — Jun 24, 1988 26.1°F — Jun 20, 1983 2.96 in — Jun 8, 1994
July 114.1°F — Jul 15, 2006 42.1°F — Jul 30, 1971 2.57 in — Jul 19, 2008
August 109.9°F — Aug 7, 1975 35.1°F — Aug 20, 1978 1.78 in — Aug 8, 1979
September 106.0°F — Sep 4, 2001 25.0°F — Sep 20, 1964 3.31 in — Sep 20, 1955
October 97.0°F — Oct 4, 1963 0.0°F — Oct 26, 2020 2.56 in — Oct 12, 2023
November 84.0°F — Nov 7, 1999 -20.9°F — Nov 14, 1959 1.19 in — Nov 8, 1977
December 72.0°F — Dec 9, 1957 -31.0°F — Dec 22, 1989 0.93 in — Dec 26, 2023

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