If you planning to travel to Watiki Water Park, 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 1:58 PM. The temperature feels like 13.45 with a humidity level of 73 so dress accordingly. Cloud coverage is 69 percent with visibility at 12.1 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 17 MPH. At the end of the day don’t miss the sunset at 11:17 PM.