Sunnyvale Weather in December

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

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

December is in the winter in Sunnyvale and is typically the 2nd coldest month of the year. Daytime maximum temperatures average around a cool 14°C (57°F), whilst at night 5°C (41°F) is normal.

Sunnyvale weather averages (imperial / metric)
Daytime temperature 14.1°C 57.4°F
Nightly temperature 4.7°C 40.5°F
Average temperature 9.4°C 48.9°F
Daily sunshine 5.6 hrs
Avg rainfall 64 mm 2.5 ins
Rainy days 9 days
Sea temperature 12.7°C 54.9°F
Humidity 80%
Windspeed 12.2kph 8 mph

On average December is the 4th wettest month of the year in Sunnyvale with around 64mm 2.5 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 Sunnyvale

Sunnyvale average temperature in December

December rainfall

Sunnyvale average rain in December

December hourly sunshine

Sunnyvale 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 Sunnyvale 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

Sunnyvale weather stats

Sunnyvale weather statistics
Hottest month: August 25.6°C 78.1°F
Driest month: July 1mm 0ins
Sunniest month: April 11.2hrs
Coldest month: January 13.9°C 57°F
Wettest month: January 87mm 3.4ins
Map showing location of Sunnyvale (37.36883, -122.03635) Sunnyvale map pin © Google

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