San Marcos Weather in December

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

The climate in San Marcos during December can be summarized as mild and reasonably dry.

December is in the winter in San Marcos and is typically the 2nd coldest month of the year. Daytime maximum temperatures average around a cool 18°C (65°F), whilst at night 6°C (43°F) is normal.

San Marcos weather averages (imperial / metric)
Daytime temperature 18.3°C 64.9°F
Nightly temperature 5.9°C 42.6°F
Average temperature 12.1°C 53.8°F
Daily sunshine 8.2 hrs
Avg rainfall 53 mm 2.1 ins
Rainy days 5 days
Sea temperature 15.7°C 60.2°F
Humidity 63%
Windspeed 10.8kph 7 mph

On average December is the 4th wettest month of the year in San Marcos with around 53mm 2.1 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 5 days, although this may vary considerably.

On the flip side this corresponds to an average of 8.2 hours of sunshine per day.

December temperatures in San Marcos

San Marcos average temperature in December

December rainfall

San Marcos average rain in December

December hourly sunshine

San Marcos 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 Marcos 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 Marcos weather stats

San Marcos weather statistics
Hottest month: August 28.7°C 83.7°F
Driest month: July 1mm 0ins
Sunniest month: August 10.9hrs
Coldest month: January 17.7°C 63.9°F
Wettest month: January 73mm 2.9ins
Map showing location of San Marcos (33.14337, -117.16614) San Marcos map pin © Google

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