The temperatures in Napa in May are comfortable with low of 11°C and and high up to 23°C.
The wather in Napa in May can vary between cold and nice weather days. Expect a few rainy days but usually not more than 3.
Our weather forecast can give you a great sense of what weather to expect in Napa in May 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
23° / 11°
Rainy Days
2
Snowy Days
0
Dry Days
29
Rainfall
25
mm
Sun Hours
11.2
Hrs
