Black Hills National Forest Weather Forecast
- 47
- 65
Severe Tstms
- 39
- 57
Rain Showers
- 46
- 61
Chance Rain Showers
- 49
- 67
Chance Thunderstorms
- 49
- 68
Chance Thunderstorms
- 49
- 68
Chance Thunderstorms
Today 30 May Northern Black Hills
Showers and Thunderstorms likely. Some Thunderstorms may be severe. Highs in the upper 60s. South Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain 70 percent.
Tonight 30 May Northern Black Hills
Mostly cloudy with Showers likely with a chance of Thunderstorms in the Evening, then partly cloudy after midnight. Some Thunderstorms may be severe. Lows in the mid 40s. Southwest Winds 5 to 10 Mph. Gusts up to 20 Mph in the evening. Chance of rain 70 percent.
Black Hills National Forest Temperature Statistics
May Temperature
Custer, Custer County Airport (16.8 miles)
Lowest 6 May, 2026
17.7 °FAverage May
49.9 °FHighest 11 May, 2026
81.6 °F
Climate (2021–Present)
Custer, Custer County Airport (16.8 miles)
Average Low 2021–2026
33.6 °FAverage 2021–2026
45.4 °FAverage High 2021–2026
57 °F