San Bruno weather in December (California, United States of America)
What can you expect from the weather in San Bruno during December? Wondering if it's an optimal time for a visit? This page provides detailed information on the weather conditions for that month.
In December, San Bruno generally has moderate temperatures and high rainfall. Daytime temperatures hover around 14°C, while nights can cool down to about 7°C. During this period, the city experiences its coolest temperatures annually.
San Bruno in December usually receives high rainfall, averaging around 113 mm for the month. With this being the wettest month, keeping an umbrella on hand might save you from getting wet from a sudden shower. Typically around 13 days of rainfall is expected.
The city usually sees around 160 hours of sunlight, indicating a moderately sunny period.
If you're looking for dry conditions and comfortable temperatures, December may not be the ideal month to visit San Bruno. May, June, July, August, September and October typically offer the best circumstances. While December tends to showcase less optimal conditions.
For an in-depth look at the yearly conditions, visit our specialized San Bruno climate page with graphs.
San Bruno, monthly averages in December
Min Temperature
7°C
Max Temperature
14°C
Water Temperature
13°C *
Chance of Rain
43%
Precipitation
113 mm
Rainy days
13 days
Humidity
78% *
Windspeed
11 km/h *
Sunshine
160 hours *
Percentage Sunshine
54% *
Where to go in the United States of America in December
Find out more about the weather in the United States of America in December and which places have the best weather conditions in this month.
perfect weather
pleasant
tolerable
unpleasant
poor
So, what should you wear in San Bruno in December?
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 in December.
Interested in more climate information?
Weather and Climate provides you with all the information you need about the climate in San Bruno.
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 climate conditions. Find out where to go with our weather planner.
