Foster City weather in December (California, United States of America)

Interested in knowing the climate of Foster City in December? Wondering about the weather this month? Our guide has all the details you need.

Temperatures

December in Foster City generally includes moderate temperatures and moderate rainfall. Daytime temperatures hover around 14°C, while nights can cool down to about 6°C. This time of year is known for its most moderate and comfortable temperatures.

Precipitation

Foster City in December usually receives moderate rainfall, averaging around 96 mm for the month. The month brings the most rain, so be prepared with an umbrella for the occasional shower. Climate statistics over the past 30 years suggest around 12 days of rain.

Average sunshine

The area enjoys a balanced 160 hours of sunlight, ensuring it's neither too overcast nor too sunny.

If you're looking for dry conditions and comfortable temperatures, December may not be the ideal month to visit Foster City. May, June, July, August, September and October generally stand out with the best circumstances. While January, February and December tend to showcase less optimal conditions.

For an in-depth look at the yearly conditions, visit our specialized Foster City climate page with graphs.

 

Foster City, monthly averages in December

Min Temperature 6°C  

Max Temperature 14°C  

Water Temperature 13°C *  

Chance of Rain 41%  

Precipitation 96 mm  

Rainy days 12 days  

Humidity 78% *  

Windspeed 11 km/h *  

Sunshine 160 hours *  

Percentage Sunshine 54% *  

* Data from: San Francisco, the United States of America (11 KM, 7 Miles).

Where to go 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.

Weather conditions Weather

Temperatures

Precipitation

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Legend perfect weather pleasant tolerable unpleasant poor

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

So, what should you wear in this month?

Plan on layering your clothes. Some days or part of the day it will be nice and warm and some moments it can be a bit chilly. Bring a rain jacket in case it rains during your stay. With a water temperature of around 13°C there is no need to bring your swimwear.

What To Do

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

5/10

Cycling

6/10

Walking

6/10

Camping

4/10

Outdoor sports

9/10

Interested in more climate information?

This site provides you with all the information you need about the climate in Foster City.

Our site offers climate and forecast data for every country in the world. Are you going to the United States of America? On this website you can find 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.