If you planning to travel to Summers Winery, 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 1:24 PM. The temperature feels like 65.30000000000001 with a humidity level of 58 so dress accordingly. Cloud coverage is 5 percent with visibility at 14.5 percent. Today’s UV index is 2, don’t forget the sunscreen if you need it! Today’s winds are traveling south-southwest at a speed of 3 MPH. At the end of the day don’t miss the sunset at 2:52 AM.