Napa Weather in December

Napa in December sees moderate temperatures, with highs around 14°C (57°F) and overnight lows of 4°C (39°F). Rainfall is at its peak this month, around 120 mm (4.7 in) on average, so waterproofs are essential.

Rainfall in Napa in December

Since this is the rainiest month of the year, it's a good idea to carry an umbrella just in case. This month experiences about 11 days of rain according to historical data, averaging 120 mm (4.7 in). Individual showers can be quite heavy this month. A proper umbrella or rain jacket is worth having.

Temperature in Napa in December

Daytime temperatures in Napa reach 14°C (57°F) in December, dropping to 4°C (39°F) at night. The month of December belongs to the winter season. Conditions are often most pleasant around the middle of the day. Nights drop to 4°C (39°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet. December often features the most temperate temperatures compared to other months.

Sunshine in Napa in December

You can expect a moderate amount of sunlight, with approximately 160 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, June, July, August and October typically offer the best weather for Napa.