Illinois · county areal climate 1951–2025
Winnebago County, IL
A 49.0°F / 37.0" normal · 2025 ran +0.8°F vs normal.
2026 so far · through Jul 9: This area is running
+1.9°F (46.9°F) vs the 1996–2025 to-date normal — the
7th warmest start of 76 years. Precipitation
110% of normal.
U.S. year-to-date → Normal (1996–2025)
49.0°F
annual mean · 37.0" precipitation
2025 vs Normal
+0.8°F
49.8°F · 31.0" (84% of normal)
Warmest Year
52.2°F
2024 · coldest 45.0°F (2014)
Wettest Year
49.1in
2019 · driest 24.1" (1958)
Hottest Day
102.2°F
Jul 7 · 2012
Coldest Day
-28.7°F
Jan 30 · 1951
Biggest Rain Day
5.23in
Jul 18 · 1996
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.