San Francisco, CA Weather

San Francisco, CA climate is mild during summer when temperatures tend to be in the 60's and cool during winter when temperatures tend to be in the 50's.

The warmest month of the year is September with an average maximum temperature of 71.30 degrees Fahrenheit, while the coldest month of the year is January with an average minimum temperature of 46.40 degrees Fahrenheit.

Temperature variations between night and day tend to be fairly limited during summer with a difference that can reach 14 degrees Fahrenheit, and fairly limited during winter with an average difference of 12 degrees Fahrenheit.

The annual average precipitation at San Francisco is 22.28 Inches. Winter months tend to be wetter than summer months. The wettest month of the year is January with an average rainfall of 4.72 Inches.

Weather Data

Current Conditions

(Updated: 5:53 PM PST FRI NOV 20 2009)

Mostly Cloudy, 53°F	Humidity: 77%	Dewpoint: 46°F
	Wind Speed: W 8.1 MPH (7 KT)	Heat Index: 53°F
	Barometer: 30.03 in.	Wind Chill: 50°F

Weather Forecast

(Generated: 2:48 PM PST FRI NOV 20 2009)

		Tonight: Mostly cloudy in the evening then becoming partly cloudy. A slight chance of thunderstorms in the evening. A chance of showers. Lows in the 40s. Northwest winds 10 to 20 mph.
	Lo: 45°F
	Hi: 55°F	Saturday: Partly cloudy in the morning then becoming mostly sunny. Highs in the 50s. Northwest winds 10 to 20 mph.
	Lo: 46°F
	Hi: 56°F	Sunday: Partly cloudy. Highs in the mid 50s to lower 60s. South winds 5 to 15 mph.
	Lo: 46°F
	Hi: 60°F	Monday: Partly cloudy. Highs in the upper 50s to mid 60s.
	Lo: 46°F
	Hi: 65°F	Tuesday: Mostly clear. Lows in the mid 40s to lower 50s. Highs in the 60s.
	Lo: 46°F
	Hi: 65°F	Wednesday: Mostly clear. Lows in the mid 40s to lower 50s. Highs in the 60s.
	Lo: 46°F
	Hi: 65°F	Wednesday: Mostly clear. Lows in the mid 40s to lower 50s. Highs in the 60s.
	Lo: 46°F

Moon, Sunrise and Sunset

	Moon Phase: Waxing Crescent Moon	Civil Twilight: 6:26 AM PST	Sunrise: 6:54 AM PST
		Sunset: 4:55 PM PST	Civil Twilight: 5:23 PM PST

Normal Climate

Normal Temperatures

(SAN FRANCISCO DOWNTOWN Weather station, 0.72 miles from San Francisco)

Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual
Max °F	58.1	61.4	62.5	64.5	65.4	67.7	68.2	69.2	71.3	70.4	64.1	58.6	65.1
Mean °F	52.3	55.0	55.9	57.3	58.4	60.5	61.3	62.4	63.7	62.5	57.5	52.7	58.3
Min °F	46.4	48.5	49.2	50.1	51.4	53.2	54.4	55.6	56.1	54.6	50.8	46.7	51.4

Normal Precipitation