Hail is the standout weather threat at Wind Cave National Park, with 33 recorded hail events in Custer County leading all hazard types by a wide margin. Combined with 10 thunderstorm wind events, summer storms here can shift from calm to dangerous quickly, turning exposed terrain into a serious risk for anyone caught in the open. Fortunately, no deaths or injuries were recorded in the hazard data, suggesting that storms are survivable with the right response.
When a storm cell builds — and in the Black Hills they build fast — get off the prairie and into your hard-sided vehicle rather than a tent or picnic shelter. Pack a quality rain cover for backpacks and a rigid-lid container for electronics and documents, since large hail can shred fabric and soak gear in minutes. Check the National Weather Service Rapid City forecast each morning and watch the western horizon for anvil-shaped clouds after noon.
Top recorded hazards in Custer County
County dataFrom NOAA Storm Events (2024). Counts of recorded incidents — not all occurred at this park.
- Hail 33
- Thunderstorm Wind 10
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About Wind Cave National Park
Wind Cave National Park protects two very different worlds - one deep within the earth, the other a sunlit world of many resources. Bison, elk, and other wildlife roam the rolling prairie grasslands and forested hillsides of one of America's oldest national parks. Below the remnant island of intact prairie sits Wind Cave, one of the longest and most complex caves in the world.
Weather
Spring: Highs range from 50-70°F with highly variable weather. Spring is the park's wettest season. Summer: Hot and generally dry with daytime temperatures regularly exceeding 80°F (27°C). Strong thunderstorms are common and can produce large hail and lightning. Fall: Generally dry with warm days and cool nights. Highs 50-60°F. Lows below freezing are common. Winter: Highs are in the high 30s with lows around 10°F. Snowfall averages 30 inches annually, periodically closing park roads.