Weather in December in San Francisco, California

< December >
	Normal Max/ High Temperature	13°C (56°F)
	Average Temperature	10°C (49°F)
	Min/ Low Temperature	6°C (43°F)
	Average Sea or Water Temp	11°C(52°F)
	Normal Precipitation	79mm (3.1in)
	Number of Wet Days (probability of rain on a day)	10 (32%)
	Average Sunlight per day	05h 46'
	Average Daylight per day	09h 36'
	Sunny (Cloudy) Daylight Hours	61% (39%)
	Sun altitude at solar noon on the 21st day.	29°

• The average sea tempeature is 11 °C (51.8 °F).
• The average temperature in San Francisco, California in December is a little cool at 9.7 °C (49.46 °F).
• Afternoons can be mild with average high temperatures reaching 13.4 °C (56.1 °F).
• Overnight temperatures are generally cool with an average low of 5.9 °C (42.6 °F).
• The variation/ range of daily mean temperatures in December is 7.5 °C (13.5 °F).
• Precipitation averages for December are moderate with 78.5mm (3.1 in) recorded across 10 days.
• The blue above San Francisco, California is fair having on average a moderate 5h 46' of splendid sunlight daily.
• The shortest day is 9h 33' long and the longest day is 9h 44' long with an average length of 9h 36'.
• There are approximately 3h 40' per day when the sun is occluded by cloud, haze, fog etc.
• It is sunny approximately 61.1% of daylight hours and cloudy 38.9% of daylight hours.

Weather Trend Graph for December in San Francisco, California, Usa