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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 2:13 PM. The temperature feels like 22.75 with a humidity level of 77 so dress accordingly. Cloud coverage is 61 percent with visibility at 12.9 percent. Today’s UV index is 2, don’t forget the sunscreen if you need it! Today’s winds are traveling west at a speed of 6 MPH. At the end of the day don’t miss the sunset at 11:16 PM.
