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.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Mill Valley's climate page.
Mill Valley Temperature in December
Min Temperature
6°C (43°F)
Max Temperature
14°C (57°F)
Chance of Rain
43%
Precipitation
172 mm (6.8 in)
Rainy days
13 days
Humidity
78% *
Sunshine
160 hours *
Percentage Sunshine
54% *
Best Places in the United States of America in December
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in December →
perfect weather
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unpleasant
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What to Wear in Mill Valley in December
The weather can swing between comfortable and chilly in December, so flexibility is key. Pack a variety of tops, at least one warm layer, and both shorts and long pants. This gives you options no matter what the day brings. It's going to pour! Pack a good poncho and prepare for very wet conditions. Sunglasses could come in handy during the sunnier parts of your trip.What To Do in Mill Valley in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Mill Valley's climate page.
Temperature Rainfall Sunshine Humidity
See the full Mill Valley climate overview or explore weather in the United States of America.
