San Ramon Weather in December

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

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

December is in the winter in San Ramon and is typically the 2nd coldest month of the year. Daytime maximum temperatures average around a cool 13°C (56°F), whilst at night 4°C (38°F) is normal.

San Ramon weather averages (imperial / metric)
Daytime temperature 13.2°C 55.7°F
Nightly temperature 3.5°C 38.2°F
Average temperature 8.3°C 46.9°F
Daily sunshine 5.5 hrs
Avg rainfall 76 mm 3 ins
Rainy days 9 days
Sea temperature 12.9°C 55.2°F
Humidity 81%
Windspeed 12.2kph 8 mph

On average December is the 2nd wettest month of the year in San Ramon with around 76mm 3 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 5.5 hours of sunshine per day.

December temperatures in San Ramon

San Ramon average temperature in December

December rainfall

San Ramon average rain in December

December hourly sunshine

San Ramon 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 Ramon 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 Ramon weather stats

San Ramon weather statistics
Hottest month: July 28.5°C 83.3°F
Driest month: July 2mm 0.1ins
Sunniest month: April 11.3hrs
Coldest month: January 12.9°C 55.2°F
Wettest month: January 96mm 3.8ins
Map showing location of San Ramon (37.77993, -121.97802) San Ramon map pin © Google

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