South Dakota · county areal climate 1951–2025
Sully County, SD
A 45.8°F / 18.9" normal · 2025 ran +1.1°F vs normal.
2026 so far · through Jul 10: This area is running
+3.2°F (44.7°F) vs the 1996–2025 to-date normal — the
6th warmest start of 76 years. Precipitation
76% of normal.
U.S. year-to-date → Normal (1996–2025)
45.8°F
annual mean · 18.9" precipitation
2025 vs Normal
+1.1°F
46.9°F · 20.8" (110% of normal)
Warmest Year
48.9°F
2012 · coldest 40.9°F (1951)
Wettest Year
28.5in
2019 · driest 7.8" (1976)
Hottest Day
111.6°F
Jul 16 · 2006
Coldest Day
-35.2°F
Feb 9 · 1994
Biggest Rain Day
2.86in
Aug 25 · 1960
Record
1951–2025
75 complete years · NOAA nClimGrid
—— normal temperature (°F) · ▮ normal precipitation (in) · 1996–2025
Areal
nClimGrid averages (NOAA/NCEI) over the whole area — an average across the region, not a single station. Separate from the
station records.