Mill Valley Weather in December

Mill Valley in December averages 14°C (57°F) during the day and 6°C (43°F) at night. This is the wettest month of the year.

Rainfall in Mill Valley in December

In this month, the heaviest downpours of the year are not uncommon. Carrying a poncho might be your best bet to stay dry. Analyzing past climate data, one can expect approximately 13 days of rain, averaging 172 mm (6.8 in). Individual showers can be quite heavy this month. A proper umbrella or rain jacket is worth having.

Temperature in Mill Valley in December

December in Mill Valley brings moderate temperatures, with highs of 14°C (57°F) and nights around 6°C (43°F). The difference between afternoon and evening temperatures is usually noticeable. Nights fall to 6°C (43°F), which is cold enough to feel it indoors too. A good thick duvet makes all the difference for a comfortable night's sleep. December is typically the month with the mildest temperatures of the year.

Sunshine in Mill Valley in December

The area experiences a moderate amount of sunshine, with approximately 160 hours of sunlight expected. This means a decent mix of sun and overcast.

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