After a few days of good weather in Napa, today should qualify as great.
The high today will reach 70 degrees, according to the National Weather Service. Overnight, the low will drop to around 38.
The weekend will be a touch cooler than today but just as enjoyable, here's the outlook:
Friday: 69 / 39 - Sunny
Saturday: 68 / 38 - Sunny
Sunday: 65 / 35 - Sunny
Monday: 63 / 35 - Sunny
Tuesday: 57 / 31 - Chance of showers