If you planning to travel to Devil's Postpile National Monument, Mammoth Lakes, California, 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 1:16 PM. The temperature feels like 55.3 with a humidity level of 29 so dress accordingly. Cloud coverage is 3 percent with visibility at 14.9 percent. Today’s UV index is 9, don’t forget the sunscreen if you need it! Today’s winds are traveling southwest at a speed of 9 MPH. At the end of the day don’t miss the sunset at 2:41 AM.