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If you planning to travel to Big Thunder Gold Mine, Keystone, South Dakota, here is your 6-day travel weather forecast to make sure you have all the essentials needed during your stay. Start your day when the sunrises at 2:05 PM. The temperature feels like 19.7 with a humidity level of 77 so dress accordingly. Cloud coverage is 76 percent with visibility at 10.6 percent. Today’s UV index is 1, don’t forget the sunscreen if you need it! Today’s winds are traveling east-southeast at a speed of 5 MPH. At the end of the day don’t miss the sunset at 11:18 PM.
