If you planning to travel to Napa River Ecological Reserve, Napa, 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 3:13 PM. The temperature feels like 56.45 with a humidity level of 96 so dress accordingly. Cloud coverage is 93 percent with visibility at 6 percent. Today’s UV index is 1, don’t forget the sunscreen if you need it! Today’s winds are traveling south at a speed of 9 MPH. At the end of the day don’t miss the sunset at 1:34 AM.