Mount Rushmore, United States Weather Forecast. Weather Forecast Issued (local time): 11 pm Saturday 10 Jun 2017. Days 0-3 Mount Rushmore Weather Summary: Heavy rain (total 26mm), heaviest during Mon night. Warm (max 20°C on Sat night, min 11°C on Mon night).
The average daily highs are approximately 50 degrees Fahrenheit and evening lows drop down to about 30 to 40 degrees. Packing Advice. The changing weather of the Mount Rushmore area calls for sensible and planned packing.
Visit nearby majestic Mount Rushmore and impressive Crazy Horse Memorial. It's also close to Custer State Park and Black Elk Peak. Attend one of the on-site rodeos during the summer (palmergulch.com for dates/times).