Montana · county areal climate 1951–2025
Jefferson County, MT
A 41.6°F / 17.3" normal · 2025 ran +1.4°F vs normal.
2026 so far · through Jul 9: This area is running
+2.6°F (40.7°F) vs the 1996–2025 to-date normal — the
5th warmest start of 76 years. Precipitation
98% of normal.
U.S. year-to-date → Normal (1996–2025)
41.6°F
annual mean · 17.3" precipitation
2025 vs Normal
+1.4°F
43.0°F · 19.0" (110% of normal)
Warmest Year
43.7°F
2015 · coldest 37.1°F (1951)
Wettest Year
29.6in
1975 · driest 11.4" (2021)
Hottest Day
94.9°F
Jul 13 · 2002
Coldest Day
-36.5°F
Jan 9 · 1962
Biggest Rain Day
2.12in
Jul 10 · 1983
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.