If you planning to travel to William Heise County Park, Julian, 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 2:26 PM. The temperature feels like 52.9 with a humidity level of 75 so dress accordingly. Cloud coverage is 61 percent with visibility at 12.7 percent. Today’s UV index is 0, don’t forget the sunscreen if you need it! Today’s winds are traveling west-southwest at a speed of 12 MPH. At the end of the day don’t miss the sunset at 12:40 AM.