Wind Cave National Park Weather Forecast
- 57
- 71
Rain Showers
- 55
- 75
Rain Showers Likely
- 53
- 68
Rain Showers
- 50
- 62
Rain Showers
- 50
- 67
Chance Rain Showers
- 54
- 73
Chance Rain Showers
Today 17 Sep Southern Black Hills
Cloudy. A slight chance of Showers this Morning, then Showers with a chance of Thunderstorms this afternoon. Highs in the lower 70s. East Winds 10 to 15 Mph with Gusts up to 30 Mph. Chance of rain 90 percent.
Tonight 17 Sep Southern Black Hills
Cloudy. Showers likely with a slight chance of Thunderstorms in the Evening, then a chance of Showers after midnight. Lows in the mid 50s. Northeast Winds 10 to 20 Mph with Gusts up to 30 Mph, Diminishing to 5 to 10 Mph with Gusts up to 20 Mph after midnight. Chance of rain 70 percent.
Wind Cave National Park Temperature Statistics
September Temperature
Custer, Custer County Airport (12.4 miles)
Lowest 15 September, 2026
41 °FAverage September
63.4 °FHighest 4 September, 2026
86.6 °F
Climate (2021–2026)
Custer, Custer County Airport (12.4 miles)
Average Low 2021–2026
33.6 °FAverage 2021–2026
45.4 °FAverage High 2021–2026
57 °F