If you planning to travel to Riverside Geyser, Yellowstone National Park, Wyoming, 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 12:54 PM. The temperature feels like 41.75 with a humidity level of 50 so dress accordingly. Cloud coverage is 8 percent with visibility at 14.7 percent. Today’s UV index is 4, don’t forget the sunscreen if you need it! Today’s winds are traveling southwest at a speed of 7 MPH. At the end of the day don’t miss the sunset at 1:47 AM.