Mount Rushmore National Memorial Rainfall Forecast

Today 12 Sep
20%
Sun 13 Sep
10%
Mon 14 Sep
40%
Tue 15 Sep
5%
Wed 16 Sep
20%
Thu 17 Sep
15%
Fri 18 Sep
20%

Mount Rushmore National Memorial Rainfall Statistics

September Rainfall

Custer, Custer County Airport (12.4 miles)

Total Rainfall 2026
14in
Daily Average 2026
0.1in
Wettest Day 30 May, 2026
2in
Wet Days 2026
71/255 (28%)
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
0.1in
Daily Average September
0.01in
Wettest Day 1 September, 2026
0.1in
Wet Days September
2/12 (17%)

Climate (2021–2025)

Custer, Custer County Airport (12.4 miles)

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Annual Average 2021–2025
18.1in
Monthly Average 2021–2026
1.5in
Daily Average 2021–2026
0.05in
Wettest Day 12 October, 2023
2in

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