Vallejo Weather in December

Thinking of visiting Vallejo in December? Expect moderate temperatures reaching 14°C (57°F) during the day, dropping to 4°C (39°F) at night, and be prepared for the wettest month of the year.

Rainfall in Vallejo in December

This month sees the most rain, so carrying an umbrella will ensure you stay dry. The climate data from previous years indicates about 12 days of rain, averaging 101 mm (4 in) for the month. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.

Temperature in Vallejo in December

Daytime highs in Vallejo in December reach 14°C (57°F), with nights around 4°C (39°F). December is typically considered a winter month. Conditions are often most pleasant around the middle of the day. With overnight lows of 4°C (39°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets. This month often claims the chilliest averages of the year.

Sunshine in Vallejo in December

The month brings about 160 hours of sunlight, offering a comfortable mix of sun and overcast.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. April, May, June, July, August, September and October typically offer the best weather for Vallejo.