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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 2:08 PM. The temperature feels like 31.2 with a humidity level of 58 so dress accordingly. Cloud coverage is 55 percent with visibility at 14.8 percent. Today’s UV index is 2, don’t forget the sunscreen if you need it! Today’s winds are traveling northwest at a speed of 8 MPH. At the end of the day don’t miss the sunset at 12:07 AM.
