If you planning to travel to Holy Terror Mini Golf, 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 2:00 PM. The temperature feels like 28.85 with a humidity level of 65 so dress accordingly. Cloud coverage is 70 percent with visibility at 11.2 percent. Today’s UV index is 1, don’t forget the sunscreen if you need it! Today’s winds are traveling west-northwest at a speed of 5 MPH. At the end of the day don’t miss the sunset at 11:19 PM.