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 3:02 PM. The temperature feels like 50.7 with a humidity level of 97 so dress accordingly. Cloud coverage is 92 percent with visibility at 8.7 percent. Today’s UV index is 0, don’t forget the sunscreen if you need it! Today’s winds are traveling southeast at a speed of 3 MPH. At the end of the day don’t miss the sunset at 12:51 AM.