All-time weather records — Letcher, SD

Record high
109.0°F
July 20, 2002
Record low
-27.8°F
December 18, 2016
Wettest day
4.87 in
June 20, 2024

Climate change signal in Letcher

43.2%

of Letcher's all-time daily heat records were set in the last decade (158 of 366 records since 2015).

33.3%

of all-time daily cold records were set in the last decade (122 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 #
1990s
10
1
2000s
131
171
2010s
116
119
2020s
109
75

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 1999, the latest in 2026. Period of observation: 1999-2026.

Records by month

Month Hottest day Coldest day Wettest day
January 68.0°F — Jan 5, 2012 -24.9°F — Jan 15, 2009 1.11 in — Jan 3, 2023
February 72.0°F — Feb 21, 2000 -21.8°F — Feb 13, 2025 0.95 in — Feb 10, 2013
March 88.0°F — Mar 18, 2012 -17.9°F — Mar 3, 2019 2.16 in — Mar 13, 2019
April 91.9°F — Apr 1, 2012 9.1°F — Apr 4, 2018 2.32 in — Apr 27, 2016
May 99.0°F — May 28, 2006 20.1°F — May 3, 2013 3.03 in — May 5, 2012
June 106.0°F — Jun 16, 2021 0.0°F — Jun 5, 2000 4.87 in — Jun 20, 2024
July 109.0°F — Jul 20, 2002 43.0°F — Jul 28, 2013 3.03 in — Jul 29, 2010
August 107.1°F — Aug 2, 2022 43.0°F — Aug 25, 2025 3.29 in — Aug 5, 2000
September 104.0°F — Sep 2, 2023 27.1°F — Sep 23, 2012 3.53 in — Sep 11, 2019
October 93.0°F — Oct 1, 2023 7.2°F — Oct 27, 2020 2.76 in — Oct 14, 2013
November 84.0°F — Nov 6, 2020 -2.7°F — Nov 14, 2014 0.77 in — Nov 16, 2015
December 66.0°F — Dec 1, 2021 -27.8°F — Dec 18, 2016 1.02 in — Dec 29, 2019

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