The temperatures in Napa in March are quite cold with temperatures between 8°C and 17°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Napa during the month of March. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Napa in March 2025.
If you’re planning to visit Napa in the near future, we highly recommend that you review the 14 day weather forecast for Napa before you arrive.
Temperatures
17° / 8°
Rainy Days
6
Snowy Days
0
Dry Days
25
Rainfall
103
mm
Sun Hours
9.8
Hrs