Bismark Lake Rainfall Forecast

Today 13 Oct
10%
Tue 14 Oct
15%
Wed 15 Oct
35%
Thu 16 Oct
70%
Fri 17 Oct
30%
Sat 18 Oct
20%
Sun 19 Oct
5%

Bismark Lake Rainfall Statistics

October Rainfall

Custer, Custer County Airport (5.6 miles)

Total Rainfall 2025
15.6in
Daily Average 2025
0.1in
Wettest Day 29 June, 2025
1.3in
Wet Days 2025
93/286 (33%)
Total Rainfall September
0.8in
Daily Average September
0.03in
Wettest Day 11 September, 2025
0.3in
Wet Days September
10/30 (33%)
Total Rainfall October
0.4in
Daily Average October
0.03in
Wettest Day 4 October, 2025
0.3in
Wet Days October
2/13 (15%)

Climate (2010–Present)

Custer, Custer County Airport (5.6 miles)

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Annual Average 2020–2024
17.9in
Monthly Average 2020–2025
1.5in
Daily Average 2020–2025
0.1in
Wettest Day 12 October, 2023
2in

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