Climate almanac
Napa
California, United States · 38.30°, -122.29°
What is the weather like in Napa in December?
In December, Napa is typically 59°F (15°C) during the day and 43°F (6°C) at night. The month brings about 4.2 in (106 mm) of precipitation in total.
- Average high59°F (15°C)
- Average low43°F (6°C)
- Precipitation4.2 in (106 mm)
- Clear or mostly clear days8
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)