Illinois · county areal climate 1951–2025
Cook County, IL
A 50.7°F / 37.8" normal · 2025 ran +0.8°F vs normal.
2026 so far · through Jul 9: This area is running
+1.6°F (48.0°F) vs the 1996–2025 to-date normal — the
10th warmest start of 76 years. Precipitation
119% of normal.
U.S. year-to-date → Normal (1996–2025)
50.7°F
annual mean · 37.8" precipitation
2025 vs Normal
+0.8°F
51.5°F · 30.1" (80% of normal)
Warmest Year
54.1°F
2024 · coldest 46.8°F (1972)
Wettest Year
49.2in
2019 · driest 22.8" (1956)
Hottest Day
103.2°F
Jul 14 · 1995
Coldest Day
-23.1°F
Jan 20 · 1985
Biggest Rain Day
4.85in
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.