Black Hills National Forest Rainfall Forecast

Today 28 Sep
55%
Tue 29 Sep
30%
Wed 30 Sep
No Rain
Thu 1 Oct
10%
Fri 2 Oct
No Rain
Sat 3 Oct
10%
Sun 4 Oct
15%

Black Hills National Forest Rainfall Statistics

September Rainfall

Custer, Custer County Airport (16.8 miles)

Total Rainfall 2026
16.9in
Daily Average 2026
0.1in
Wettest Day 20 September, 2026
2.1in
Wet Days 2026
78/271 (29%)
Total Rainfall August
2.9in
Daily Average August
0.1in
Wettest Day 15 August, 2026
1.3in
Wet Days August
10/31 (32%)
Total Rainfall September
3in
Daily Average September
0.1in
Wettest Day 20 September, 2026
2.1in
Wet Days September
9/28 (32%)

Climate (2021–2025)

Custer, Custer County Airport (16.8 miles)

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Annual Average 2021–2025
18.1in
Monthly Average 2021–2026
1.5in
Daily Average 2021–2026
0.1in
Wettest Day 20 September, 2026
2.1in

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