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 2:48 PM. The temperature feels like 21.05 with a humidity level of 64 so dress accordingly. Cloud coverage is 32 percent with visibility at 14.4 percent. Today’s UV index is 3, don’t forget the sunscreen if you need it! Today’s winds are traveling east at a speed of 3 MPH. At the end of the day don’t miss the sunset at 12:39 AM.