All-time weather records — Edgemont, SD

Record high
111.0°F
June 22, 2016
Record low
-40.0°F
December 22, 1989
Wettest day
3.46 in
September 30, 2014

Climate change signal in Edgemont

39.6%

of Edgemont's all-time daily heat records were set in the last decade (145 of 366 records since 2015).

41.8%

of all-time daily cold records were set in the last decade (153 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 #
1940s
·
·
1950s
·
·
1970s
7
7
1980s
52
74
1990s
63
57
2000s
46
46
2010s
118
90
2020s
80
92

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 1979, the latest in 2026. Period of observation: 1948-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 68.0°F — Jan 31, 1989 -36.9°F — Jan 14, 2024 0.70 in — Jan 21, 2018
February 73.9°F — Feb 19, 2016 -38.9°F — Feb 15, 2021 0.60 in — Feb 27, 1987
March 91.9°F — Mar 22, 2026 -25.1°F — Mar 3, 2019 1.60 in — Mar 24, 2009
April 91.9°F — Apr 21, 1980 -9.0°F — Apr 7, 2023 2.73 in — Apr 18, 2000
May 96.1°F — May 12, 2025 16.0°F — May 5, 2024 1.50 in — May 24, 2008
June 111.0°F — Jun 22, 2016 28.0°F — Jun 10, 2019 3.35 in — Jun 13, 2005
July 111.0°F — Jul 21, 2016 39.9°F — Jul 1, 2020 2.63 in — Jul 9, 2001
August 107.1°F — Aug 8, 2025 0.0°F — Aug 17, 1988 1.79 in — Aug 1, 1999
September 105.1°F — Sep 6, 2020 8.1°F — Sep 29, 1984 3.46 in — Sep 30, 2014
October 95.0°F — Oct 3, 2011 -16.1°F — Oct 26, 2020 1.83 in — Oct 11, 2013
November 80.1°F — Nov 3, 2008 -20.9°F — Nov 13, 2014 0.97 in — Nov 2, 1982
December 70.0°F — Dec 2, 1995 -40.0°F — Dec 22, 1989 0.74 in — Dec 17, 2016

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