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 2:38 PM. The temperature feels like 56.25 with a humidity level of 85 so dress accordingly. Cloud coverage is 35 percent with visibility at 12.6 percent. Today’s UV index is 3, don’t forget the sunscreen if you need it! Today’s winds are traveling west-northwest at a speed of 5 MPH. At the end of the day don’t miss the sunset at 1:08 AM.