Illinois · county areal climate 1951–2025
Iroquois County, IL
A 51.6°F / 38.1" normal · 2025 ran +0.2°F vs normal.
2026 so far · through Jul 10: This area is running
+1.6°F (49.6°F) vs the 1996–2025 to-date normal — the
10th warmest start of 76 years. Precipitation
96% of normal.
U.S. year-to-date → Normal (1996–2025)
51.6°F
annual mean · 38.1" precipitation
2025 vs Normal
+0.2°F
51.8°F · 30.3" (79% of normal)
Warmest Year
54.4°F
1998 · coldest 47.8°F (2014)
Wettest Year
55.6in
1993 · driest 24.2" (1963)
Hottest Day
103.2°F
Aug 18 · 1988
Coldest Day
-24.6°F
Jan 20 · 1985
Biggest Rain Day
5.48in
Jul 13 · 1957
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.