O'Fallon Rainfall Forecast

Today 14 Aug
30%
Sat 15 Aug
10%
Sun 16 Aug
5%
Mon 17 Aug
40%
Tue 18 Aug
10%
Wed 19 Aug
10%
Thu 20 Aug
20%

O'Fallon Rainfall Statistics

August Rainfall

Belleville, Scott AFB/MidAmerica Airport (4.3 miles)

Total Rainfall 2026
24.5in
Daily Average 2026
0.1in
Wettest Day 18 May, 2026
2.5in
Wet Days 2026
67/226 (30%)
Total Rainfall July
5.4in
Daily Average July
0.2in
Wettest Day 10 July, 2026
1.9in
Wet Days July
13/31 (42%)
Total Rainfall August
1.4in
Daily Average August
0.1in
Wettest Day 6 August, 2026
1.4in
Wet Days August
3/14 (21%)

Climate (2021–2025)

Belleville, Scott AFB/MidAmerica Airport (4.3 miles)

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Annual Average 2021–2025
33.5in
Monthly Average 2021–2026
2.9in
Daily Average 2021–2026
0.1in
Wettest Day 11 May, 2022
6.4in

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