Napa Weather: December
 |
Average Day Temperature: | 55.0°F |
|
Average Night Temperature: | 44.4°F |
|
Number of Sunny Days: | 12 days |
| Sunshine Hours: | 9.5 - 9.7 hours | |
|
Number of Rainy Days: | 3 days |
| Precipitation Totals: | 1.4 in | |
| detailed information | ||
Air Temperature in December, °F
The highest day temperature in December 2025 was 66°F. The lowest night temperature was 36°F. The average values for day and night temperatures during December were 55.0°F и 44.0°F respectivly.
Sunny, Cloudy and Gloomy days
You can expect various weather conditions during December. Be ready for sunny, cloudy or even gloomy days.
Precipitation Totals in December, in
Precipitation total in December for Napa is 1.4 in. It makes december the most rainy month of the year.
Wind Speed in December, mph
The average wind speed in December is 3.8 mph. This value is relatively stable throughout the year.
Average Sunny Hours Per Day
We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Napa in December is 5.3 hours.
Napa on the Weather Map
USA Resorts:
NAME
F°
| Boston |  |
+62 |
| Chicago |  |
+66 |
| Hawaii |  |
+80 |
| Las Vegas | |
+80 |
| Los Angeles | |
+72 |
| Maui |  |
+66 |
| Miami |  |
+88 |
| Myrtle Beach | |
+78 |
| New York | |
+66 |
| Panama City Beach | |
+90 |
| San Diego | |
+70 |
| San Francisco | |
+60 |
| Santa Monica | |
+72 |
| Sarasota | |
+86 |
| Washington |  |
+66 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Napa
Local time: 06:38
15 sep, tuesday
| 0900 |  |
64°F | NE 3 mph |
| 1200 |  |
80°F | NE 6 mph |
| 1500 | |
82°F | NE 7 mph |
| 1800 | |
72°F | NE 6 mph |
| 2100 |  |
60°F | NE 5 mph |
16 sep, wednesday
| 0000 | |
56°F | NE 5 mph |
| 0300 |  |
56°F | NE 5 mph |
| 0600 | |
56°F | NE 4 mph |