Iowa · county areal climate 1951–2025
Jefferson County, IA
A 50.8°F / 37.1" normal · 2025 ran +0.7°F vs normal.
2026 so far · through Jul 10: This area is running
+2.6°F (49.5°F) vs the 1996–2025 to-date normal — the
6th warmest start of 76 years. Precipitation
107% of normal.
U.S. year-to-date → Normal (1996–2025)
50.8°F
annual mean · 37.1" precipitation
2025 vs Normal
+0.7°F
51.5°F · 32.6" (88% of normal)
Warmest Year
54.2°F
2012 · coldest 46.7°F (2014)
Wettest Year
55.4in
2010 · driest 19.3" (1988)
Hottest Day
106.2°F
Jul 24 · 2012
Coldest Day
-25.6°F
Jan 31 · 2019
Biggest Rain Day
4.28in
Sep 10 · 2014
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.