Marin County

Marin County Weather in December

Average temperatures, rainfall, sunshine and the best places to visit in Marin County, the United States of America in December.

Planning a getaway to Marin County, the United States of America this December and curious about the weather you should prepare for? Discover all the vital details you need on this page, solving your puzzle:

What to Expect in Marin County in December

Marin County, the United States of America is a region in the United States of America. December in Marin County generally has mild temperatures, with precipitation levels ranging from high to heavy. December falls during the winter season.

Temperatures

You can expect mild maximum daytime temperatures of around 14°C (57°F) and nighttime temperatures around 4°C (39°F) in Novato. In general, this month stands out as the coldest period throughout the year. However, even though December is the coolest month, you can still find places in Marin County, the United States of America with moderate temperatures, ensuring a pleasant experience throughout the year.

To learn more about the conditions in specific areas of Marin County, the United States of America, check out the map below.

Precipitation

In December, precipitation varies across different areas. From high rainfall in Sausalito with an average of 136 mm (5.4 in) to heavy rainfall in Fairfax with 190 mm (7.5 in). Going by our weather data, it is the wettest month of the year in Novato.

Average sunshine

Sunshine amounts are decent in most places. Novato gets approximately 160 hours of sunlight in December, offering a reasonable amount of both bright and cloudy periods. Curious about sunnier destinations? Our weather planner makes it easy to find places worldwide with pleasant weather.

Explore Marin County by month

Pick a month to see the average temperature, rainfall and sunshine in Marin County — and find the best time to visit. (based on Novato)

Best Places to Visit in Marin County in December

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Marin County.

perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

Popular Destinations in Marin County

What is the weather like in December for some of the most popular destinations in Marin County, the United States of America?

Temperature range in Marin County (December)

Precipitation variation in Marin County (December)

Novato

In December Novato generally has moderate temperatures with maximum daytime temperatures around 14°C (57°F), minimum nighttime temperatures around 4°C (39°F) and high monthly rainfall. So on average the conditions are unpleasant that month.

November
December
January
Max temperature
18°C (64°F)
14°C (57°F)
14°C (57°F)
Min temperature
7°C (45°F)
4°C (39°F)
5°C (41°F)
Monthly sun hours
173 hours
160 hours
186 hours
Monthly rainfall
67 mm (2.6 in)
145 mm (5.7 in)
106 mm (4.2 in)
Monthly rainy days
8 days
12 days
10 days
Weather conditions

San Rafael

In December San Rafael generally has moderate temperatures with maximum daytime temperatures around 14°C (57°F), minimum nighttime temperatures around 6°C (43°F) and heavy monthly rainfall. So on average the conditions are unpleasant that month.

November
December
January
Max temperature
18°C (64°F)
14°C (57°F)
14°C (57°F)
Min temperature
8°C (46°F)
6°C (43°F)
6°C (43°F)
Monthly sun hours
173 hours
160 hours
186 hours
Monthly rainfall
72 mm (2.8 in)
172 mm (6.8 in)
127 mm (5 in)
Monthly rainy days
7 days
13 days
10 days
Weather conditions

Mill Valley

In December Mill Valley generally has moderate temperatures with maximum daytime temperatures around 14°C (57°F), minimum nighttime temperatures around 6°C (43°F) and heavy monthly rainfall. So on average the conditions are unpleasant that month.

November
December
January
Max temperature
18°C (64°F)
14°C (57°F)
14°C (57°F)
Min temperature
8°C (46°F)
6°C (43°F)
6°C (43°F)
Monthly sun hours
173 hours
160 hours
186 hours
Monthly rainfall
78 mm (3.1 in)
172 mm (6.8 in)
122 mm (4.8 in)
Monthly rainy days
8 days
13 days
9 days
Weather conditions

Sausalito

In December Sausalito generally has moderate temperatures with maximum daytime temperatures around 14°C (57°F), minimum nighttime temperatures around 7°C (45°F) and high monthly rainfall. So on average the conditions are unpleasant that month.

November
December
January
Max temperature
18°C (64°F)
14°C (57°F)
15°C (59°F)
Min temperature
9°C (48°F)
7°C (45°F)
7°C (45°F)
Monthly sun hours
173 hours
160 hours
186 hours
Monthly rainfall
60 mm (2.4 in)
136 mm (5.4 in)
92 mm (3.6 in)
Monthly rainy days
8 days
13 days
9 days
Weather conditions

Fairfax

In December Fairfax generally has moderate temperatures with maximum daytime temperatures around 13°C (55°F), minimum nighttime temperatures around 5°C (41°F) and heavy monthly rainfall. So on average the conditions are poor that month.

November
December
January
Max temperature
18°C (64°F)
13°C (55°F)
14°C (57°F)
Min temperature
8°C (46°F)
5°C (41°F)
6°C (43°F)
Monthly sun hours
173 hours
160 hours
186 hours
Monthly rainfall
82 mm (3.2 in)
190 mm (7.5 in)
142 mm (5.6 in)
Monthly rainy days
8 days
13 days
10 days
Weather conditions

Is your destination not in the list? Have a look at all destinations in Marin County, in the United States of America.

Popular cities in December

Day & night temperatures, rainfall and average weather in Marin County in December.

City Weather Day temp Night temp Rainfall
Novato 14°C (57°F) 4°C (39°F) 145 mm (5.7 in)
San Rafael 14°C (57°F) 6°C (43°F) 172 mm (6.8 in)
Mill Valley 14°C (57°F) 6°C (43°F) 172 mm (6.8 in)
Sausalito 14°C (57°F) 7°C (45°F) 136 mm (5.4 in)
Fairfax 13°C (55°F) 5°C (41°F) 190 mm (7.5 in)
Larkspur 14°C (57°F) 6°C (43°F) 172 mm (6.8 in)

Marin County weather in December: frequently asked questions

What is the weather like in Marin County, the United States of America in December?

Expect unpleasant weather across Marin County, the United States of America in December. The popular destination of Novato averages 14°C (57°F) by day and 4°C (39°F) at night during this winter month.

What is the average temperature in Marin County, the United States of America in December?

Daytime temperatures in Novato peak at roughly 14°C (57°F) in December, dropping to about 4°C (39°F) overnight.

Does Marin County, the United States of America get a lot of rain in December?

Marin County, the United States of America sees substantial rainfall in December. Novato typically averages about 145 mm (5.7 in), a mix of wet and dry days, but bring an umbrella.

Is December a Good Time to Visit Marin County, the United States of America?

In our opinion, December may not be the ideal time to visit Marin County, the United States of America due to the typically unpleasant weather in Novato.

Generally speaking, the best visiting conditions can be found in April, May, June, July, August, September and October offering mostly perfect weather in Novato. The weather in January, February and December, on the other hand, tends to be unpleasant.

Interested in more climate information?

We have much more information about the climate in Marin County.

Weather and climate has detailed information for every country in the world. Are you going to the United States of America? Get detailed historical weather averages for many cities in the United States of America.

Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.

Bucket list

Need travel inspiration? Check out our bucket list articles and be inspired.