Starved Rock State Park Rainfall Forecast

Today 30 Dec
10%
Wed 31 Dec
55%
Thu 1 Jan
25%
Fri 2 Jan
No Rain
Sat 3 Jan
No Rain
Sun 4 Jan
5%
Mon 5 Jan
10%

Starved Rock State Park Rainfall Statistics

December Rainfall

Illinois Valley Regional Airport (7.5 miles)

Total Rainfall 2025
35.4in
Daily Average 2025
0.1in
Wettest Day 17 August, 2025
3.1in
Wet Days 2025
65/364 (18%)
Total Rainfall November
1.3in
Daily Average November
0.04in
Wettest Day 8 November, 2025
0.7in
Wet Days November
4/30 (13%)
Total Rainfall December
0.6in
Daily Average December
0.02in
Wettest Day 18 December, 2025
0.3in
Wet Days December
4/30 (13%)

Climate (2010–Present)

Illinois Valley Regional Airport (7.5 miles)

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Annual Average 2020–2024
30.9in
Monthly Average 2020–2025
2.9in
Daily Average 2020–2025
0.1in
Wettest Day 14 December, 2022
3.4in

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