If you planning to travel to Ernest Hemingway Memorial, Sun Valley, Idaho, 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 3:08 PM. The temperature feels like 23 with a humidity level of 86 so dress accordingly. Cloud coverage is 75 percent with visibility at 13.4 percent. Today’s UV index is 2, don’t forget the sunscreen if you need it! Today’s winds are traveling west at a speed of 4 MPH. At the end of the day don’t miss the sunset at 12:05 AM.