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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 11:14 AM. The temperature feels like 62.25 with a humidity level of 49 so dress accordingly. Cloud coverage is 6 percent with visibility at 14.9 percent. Today’s UV index is 10, don’t forget the sunscreen if you need it! Today’s winds are traveling west-southwest at a speed of 7 MPH. At the end of the day don’t miss the sunset at 2:28 AM.
