Weather in Napa: December
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Average day temperature: | 54.5°F |
| Average night temperature: | 45.0°F | |
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Number of sunny days: | 12 days |
| Day length: | 9.5 - 9.7 hours | |
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Number of rainy days: | 3 days |
| Precipitation totals: | 1.3 in. | |
| more information | ||
14 days
forecast
forecast
| Napa |
weather in
January
January
| Napa |
Air temperature in December, °F
Show year:
2025
2024
2023
The highest day temperature during December of 2025 was 64°F. At the same time the lowest night temperature was 37°F. Daily and nightly averages during December were 54.5°F and 44.9°F.
Sunny, partly cloudy and cloudy days
Number of sunny, partly cloudy and cloudy days in December is almost equal.
Precipitation total in December, in.
Precipitation total value in Napa in December is 1.3 in. Other months of the year show relatively similar values.
Wind speed in December, mph
The average wind speed value in December is 3.8 mph It makes December one of the least windy months of the year.
Average sunny hours
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in December is: 4.9.
Best time for vacation in Napa
Napa on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Napa
Local time: 22:41
December 29, monday
0000
43°F
SW
4 mph
4 mph
0300
41°F
SW
4 mph
4 mph
0600
41°F
SW
4 mph
4 mph
0900
41°F
SW
4 mph
4 mph
1200
55°F
W
4 mph
4 mph
1500
63°F
W
4 mph
4 mph
1800
54°F
W
3 mph
3 mph
2100
48°F
SW
4 mph
4 mph
