Bismarck Rainfall Forecast

Today 15 Sep
No Rain
Tue 16 Sep
15%
Wed 17 Sep
25%
Thu 18 Sep
5%
Fri 19 Sep
No Rain
Sat 20 Sep
5%
Sun 21 Sep
20%

Bismarck Rainfall Statistics

September Rainfall

Garrett County Airport (25.5 miles)

Total Rainfall 2025
21.6in
Daily Average 2025
0.1in
Wettest Day 13 May, 2025
1.8in
Wet Days 2025
71/258 (28%)
Total Rainfall August
1.6in
Daily Average August
0.1in
Wettest Day 13 August, 2025
0.5in
Wet Days August
10/31 (32%)
Total Rainfall September
0.5in
Daily Average September
0.04in
Wettest Day 6 September, 2025
0.2in
Wet Days September
4/15 (27%)

Climate (2010–Present)

Garrett County Airport (25.5 miles)

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Annual Average 2020–2024
4in
Monthly Average 2020–2025
0.7in
Daily Average 2020–2025
0.02in
Wettest Day 13 May, 2025
1.8in

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