San Mateo Weather in December

What's the weather like in San Mateo (California) in December 2024?

The climate in San Mateo during December can be summarized as cool and reasonably dry.

December is in the winter in San Mateo and is typically the 2nd coldest month of the year. Daytime maximum temperatures average around a cool 14°C (57°F), whilst at night 6°C (43°F) is normal.

San Mateo weather averages (imperial / metric)
Daytime temperature 13.9°C 56.9°F
Nightly temperature 6°C 42.7°F
Average temperature 9.9°C 49.8°F
Daily sunshine 5.6 hrs
Avg rainfall 73 mm 2.9 ins
Rainy days 9 days
Sea temperature 12.7°C 54.9°F
Humidity 79%
Windspeed 12.6kph 8 mph

On average December is the 2nd wettest month of the year in San Mateo with around 73mm 2.9 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.

On the flip side this corresponds to an average of 5.6 hours of sunshine per day.

December temperatures in San Mateo

San Mateo average temperature in December

December rainfall

San Mateo average rain in December

December hourly sunshine

San Mateo average rain in December

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in San Mateo in December 2024.

Other monthly averages

Best places to visit in December

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

San Mateo weather stats

San Mateo weather statistics
Hottest month: September 23.8°C 74.8°F
Driest month: July 1mm 0ins
Sunniest month: April 11.1hrs
Coldest month: January 13.5°C 56.3°F
Wettest month: January 95mm 3.7ins
Map showing location of San Mateo (37.56299, -122.32553) San Mateo map pin © Google

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