Grimsby Rainfall Forecast

Today 18 Sep
5%
Fri 19 Sep
35%
Sat 20 Sep
30%
Sun 21 Sep
35%
Mon 22 Sep
55%
Tue 23 Sep
40%
Wed 24 Sep
25%

Grimsby Rainfall Statistics

September Rainfall

Southern Illinois Airport (11.2 miles)

Total Rainfall 2025
29.8in
Daily Average 2025
0.1in
Wettest Day 5 April, 2025
2.6in
Wet Days 2025
81/261 (31%)
Total Rainfall August
0.02in
Daily Average August
0in
Wettest Day 12 August, 2025
0.02in
Wet Days August
1/31 (3%)
Total Rainfall September
0.1in
Daily Average September
0.01in
Wettest Day 14 September, 2025
0.1in
Wet Days September
3/18 (17%)

Climate (2010–Present)

Southern Illinois Airport (11.2 miles)

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Annual Average 2020–2024
38.5in
Monthly Average 2020–2025
3.1in
Daily Average 2020–2025
0.1in
Wettest Day 4 September, 2021
3in

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