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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 11:46 AM. The temperature feels like 38.05 with a humidity level of 45 so dress accordingly. Cloud coverage is 37 percent with visibility at 14.9 percent. Today’s UV index is 6, don’t forget the sunscreen if you need it! Today’s winds are traveling west-southwest at a speed of 6 MPH. At the end of the day don’t miss the sunset at 1:56 AM.
