If you planning to travel to Mount Tamalpais State Park, Mill Valley, 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 1:30 PM. The temperature feels like 60.25 with a humidity level of 81 so dress accordingly. Cloud coverage is 3 percent with visibility at 14.7 percent. Today’s UV index is 9, don’t forget the sunscreen if you need it! Today’s winds are traveling west-northwest at a speed of 8 MPH. At the end of the day don’t miss the sunset at 2:54 AM.