Severe summer thunderstorms are the standout hazard at Mount Rushmore, with Pennington County recording 47 hail events and 33 thunderstorm wind events in recent data — a combined 80 high-impact weather incidents that can strike with little warning across the open granite terrain. These storms typically build fast in the Black Hills afternoon, making exposed viewing areas genuinely dangerous when lightning arrives alongside damaging winds and large hail.
Before heading out, download a radar app like MyRadar and check conditions by noon, since storms most often develop between 2 and 6 p.m. If you see anvil-shaped clouds building to the west, move immediately to your hard-sided vehicle or the memorial's indoor visitor center rather than sheltering under trees. Pack a small hail-rated windshield cover if you're in an RV or camper van, and keep windows closed when storms are in the forecast to avoid interior water damage.
Top recorded hazards in Pennington County
County dataFrom NOAA Storm Events (2024). Counts of recorded incidents — not all occurred at this park.
- Hail 47
- Thunderstorm Wind 33
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About Mount Rushmore National Memorial
Majestic figures of George Washington, Thomas Jefferson, Theodore Roosevelt and Abraham Lincoln, surrounded by the beauty of the Black Hills of South Dakota, tell the story of the birth, growth, development and preservation of this country. From the history of the first inhabitants to the diversity of America today, Mount Rushmore brings visitors face to face with the rich heritage we all share.
Weather
Weather at Mount Rushmore can be highly variable in any season. Summer high temperatures range from 70 to 100 degrees Fahrenheit. Fall high temperatures range from 45 to 80 degrees Fahrenheit. Winter high temperatures range from 20 to 40 degrees Fahrenheit. Spring high temperatures range from 30 to 70 degrees Fahrenheit. Typically, July and August are the warmest months and January and February are the coldest. March and April receive the most snow, while May and June receive the most rain.