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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 2:20 PM. The temperature feels like 5.55 with a humidity level of 79 so dress accordingly. Cloud coverage is 45 percent with visibility at 8 percent. Today’s UV index is 0, don’t forget the sunscreen if you need it! Today’s winds are traveling southeast at a speed of 4 MPH. At the end of the day don’t miss the sunset at 11:16 PM.
