Big Rock Park Weather Forecast
- 61
- 90
Chance Thunderstorms
- 60
- 84
Chance Thunderstorms
- 61
- 87
Rain Showers Likely
- 58
- 86
Chance Thunderstorms
- 59
- 86
Chance Thunderstorms
- 60
- 87
Mostly Sunny
- 63
- 92
Mostly Sunny
Today 27 Jul Central Black Hills
Mostly cloudy with a chance of Showers and Thunderstorms. Highs in the upper 80s to mid 90s. Southwest Winds 5 to 10 Mph with Gusts up to 25 Mph. Chance of rain 50 percent.
Tonight 27 Jul Central Black Hills
Partly cloudy. A slight chance of Showers and Thunderstorms this evening. Lows in the mid 60s. East Winds 5 to 10 Mph with Gusts up to 20 Mph, becoming southwest. Chance of rain 20 percent.
Big Rock Park Temperature Statistics
July Temperature
Custer, Custer County Airport (1.9 miles)
Lowest 3 July, 2026
50.6 °FAverage July
71.1 °FHighest 25 July, 2026
96.1 °F
Climate (2021–2026)
Custer, Custer County Airport (1.9 miles)
Average Low 2021–2026
33.5 °FAverage 2021–2026
45.3 °FAverage High 2021–2026
56.9 °F