South Dakota · county areal climate 1951–2025
Mellette County, SD
A 48.7°F / 20.4" normal · 2025 ran +1.5°F vs normal.
2026 so far · through Jul 9: This area is running
+3.8°F (48.1°F) vs the 1996–2025 to-date normal — the
2nd warmest start of 76 years. Precipitation
79% of normal.
U.S. year-to-date → Normal (1996–2025)
48.7°F
annual mean · 20.4" precipitation
2025 vs Normal
+1.5°F
50.2°F · 21.0" (103% of normal)
Warmest Year
52.1°F
2012 · coldest 43.6°F (1951)
Wettest Year
30.8in
2019 · driest 10.7" (1974)
Hottest Day
111.9°F
Jul 16 · 2006
Coldest Day
-28.4°F
Dec 23 · 1983
Biggest Rain Day
3.02in
Oct 13 · 2023
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.