If you planning to travel to Black Hills Caverns, Rapid City, 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 20 with a humidity level of 72 so dress accordingly. Cloud coverage is 67 percent with visibility at 9.9 percent. Today’s UV index is 0, don’t forget the sunscreen if you need it! Today’s winds are traveling north-northwest at a speed of 9 MPH. At the end of the day don’t miss the sunset at 11:19 PM.