Illinois · county areal climate 1951–2025

Warren County, IL

A 37.3" / 51.2°F normal · 2025 ran 78% of normal precipitation.
2026 so far · through Jul 25: This area is at 101% (23.06") of the 1996–2025 to-date normal — the 26th wettest start of 76 years. Temperature +2.4°F vs normal. U.S. year-to-date →

Normal (1996–2025)

37.3in
annual precipitation · 51.2°F

2025 vs Normal

78%
29.2" · 52.3°F (+1.1 vs normal)

Wettest Year

52.2in
2009

Driest Year

22.9in
1988

Biggest Rain Day

4.35in
Apr 18 · 2013

Warmest Year

54.0°F
2012

Record

1951–2025
75 complete years · NOAA nClimGrid

Monthly Climate

23°
J
28°
F
40°
M
51°
A
62°
M
72°
J
75°
J
73°
A
66°
S
54°
O
41°
N
29°
D
—— 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.

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