If you planning to travel to Giant 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 1:05 PM. The temperature feels like 22.299999999999997 with a humidity level of 81 so dress accordingly. Cloud coverage is 77 percent with visibility at 8 percent. Today’s UV index is 4, don’t forget the sunscreen if you need it! Today’s winds are traveling south at a speed of 7 MPH. At the end of the day don’t miss the sunset at 1:50 AM.