If you planning to travel to Sterling Vineyards, 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 2:50 PM. The temperature feels like 49.35 with a humidity level of 95 so dress accordingly. Cloud coverage is 82 percent with visibility at 8 percent. Today’s UV index is 0, don’t forget the sunscreen if you need it! Today’s winds are traveling south-southeast at a speed of 5 MPH. At the end of the day don’t miss the sunset at 12:58 AM.