South Dakota · county areal climate 1951–2025
Lyman County, SD
A 48.1°F / 21.0" normal · 2025 ran +1.2°F vs normal.
2026 so far · through Jul 10: This area is running
+3.1°F (46.9°F) vs the 1996–2025 to-date normal — the
5th warmest start of 76 years. Precipitation
84% of normal.
U.S. year-to-date → Normal (1996–2025)
48.1°F
annual mean · 21.0" precipitation
2025 vs Normal
+1.2°F
49.3°F · 21.2" (101% of normal)
Warmest Year
51.3°F
2012 · coldest 42.8°F (1951)
Wettest Year
33.8in
2019 · driest 9.2" (1976)
Hottest Day
110.1°F
Jul 11 · 1966
Coldest Day
-32.6°F
Feb 9 · 1994
Biggest Rain Day
2.81in
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.