Illinois · county areal climate 1951–2025
Jersey County, IL
A 55.3°F / 40.7" normal · 2025 ran +0.8°F vs normal.
2026 so far · through Jul 10: This area is running
+2.3°F (54.3°F) vs the 1996–2025 to-date normal — the
4th warmest start of 76 years. Precipitation
95% of normal.
U.S. year-to-date → Normal (1996–2025)
55.3°F
annual mean · 40.7" precipitation
2025 vs Normal
+0.8°F
56.1°F · 33.8" (83% of normal)
Warmest Year
58.1°F
2012 · coldest 51.8°F (1979)
Wettest Year
58.4in
2008 · driest 24.8" (1953)
Hottest Day
109.6°F
Jul 14 · 1954
Coldest Day
-18.5°F
Jan 17 · 1977
Biggest Rain Day
4.28in
Dec 27 · 2015
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.