Vacaville Weather in December

Vacaville in December sees moderate daytime temperatures of 14°C (57°F) and nighttime lows of 3°C (37°F). With the highest rainfall of the year it is wise to pack an umbrella and expect frequent showers.

Rainfall in Vacaville in December

As the month with the most rain, you'll want to have an umbrella with you to manage the frequent showers. Expect around 11 days of rain based on historical data, with 100 mm (3.9 in) average. 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 Vacaville in December

In December, expect moderate temperatures in Vacaville, with highs of 14°C (57°F) and lows of 3°C (37°F) at night. December is a notable month of the winter season. A light jacket or extra layer can be useful, especially outside the warmest hours of the day. With overnight lows of 3°C (37°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets. During this period, the city experiences its coolest temperatures annually.

Sunshine in Vacaville in December

You can expect a moderate amount of sunlight, with approximately 141 hours. This means a pleasant mix of sun and overcast.

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