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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 2:15 PM. The temperature feels like 30.85 with a humidity level of 55 so dress accordingly. Cloud coverage is 52 percent with visibility at 14.9 percent. Today’s UV index is 2, don’t forget the sunscreen if you need it! Today’s winds are traveling west-northwest at a speed of 8 MPH. At the end of the day don’t miss the sunset at 11:16 PM.
