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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 1:08 PM. The temperature feels like 35.900000000000006 with a humidity level of 58 so dress accordingly. Cloud coverage is 35 percent with visibility at 13.9 percent. Today’s UV index is 4, don’t forget the sunscreen if you need it! Today’s winds are traveling north-northwest at a speed of 17 MPH. At the end of the day don’t miss the sunset at 12:10 AM.
