If you planning to travel to South Yuba River State Park, Penn 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 3:07 PM. The temperature feels like 55.3 with a humidity level of 65 so dress accordingly. Cloud coverage is 2 percent with visibility at 14.4 percent. Today’s UV index is 1, don’t forget the sunscreen if you need it! Today’s winds are traveling east-southeast at a speed of 3 MPH. At the end of the day don’t miss the sunset at 12:40 AM.