Princeton Rainfall Forecast

Today 14 Sep
25%
Tue 15 Sep
70%
Wed 16 Sep
85%
Thu 17 Sep
65%
Fri 18 Sep
45%
Sat 19 Sep
60%
Sun 20 Sep
45%

Princeton Rainfall Statistics

September Rainfall

Illinois Valley Regional Airport (16.2 miles)

Total Rainfall 2026
34.4in
Daily Average 2026
0.1in
Wettest Day 1 August, 2026
2.4in
Wet Days 2026
64/257 (25%)
Total Rainfall August
8.8in
Daily Average August
0.3in
Wettest Day 1 August, 2026
2.4in
Wet Days August
15/31 (48%)
Total Rainfall September
0.2in
Daily Average September
0.02in
Wettest Day 9 September, 2026
0.2in
Wet Days September
1/14 (7%)

Climate (2021–2025)

Illinois Valley Regional Airport (16.2 miles)

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Annual Average 2021–2025
34.5in
Monthly Average 2021–2026
3.2in
Daily Average 2021–2026
0.1in
Wettest Day 14 December, 2022
3.4in

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