Hillsborough, CA Weather

Hillsborough, 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 73.40 degrees Fahrenheit, while the coldest month of the year is January with an average minimum temperature of 42.90 degrees Fahrenheit.

Temperature variations between night and day tend to be fairly limited during summer with a difference that can reach 15 degrees Fahrenheit, and fairly limited during winter with an average difference of 15 degrees Fahrenheit.

The annual average precipitation at Hillsborough is 23.35 Inches. Winter months tend to be wetter than summer months. The wettest month of the year is January with an average rainfall of 4.91 Inches.

Weather Data

Current Conditions

(Updated: 6:56 PM PST TUE NOV 24 2009)

Fair, 58°F	Humidity: 56%	Dewpoint: 42°F
	Wind Speed: CALM	Heat Index: 58°F
	Barometer: 30.14 in.	Wind Chill: 58°F

Moon, Sunrise and Sunset

	Moon Phase: Waxing Gibbous Moon	Civil Twilight: 6:29 AM PST	Sunrise: 6:58 AM PST
		Sunset: 4:53 PM PST	Civil Twilight: 5:22 PM PST

Normal Climate

Normal Temperatures

(RICHMOND Weather station, 3.20 miles from Hillsborough)

Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual
Max °F	57.1	60.9	63.2	66.3	68.3	70.7	70.5	71.0	73.4	71.8	63.6	57.3	66.2
Mean °F	50.0	53.2	55.0	57.4	59.6	62.2	62.7	63.5	64.8	62.5	55.6	50.2	58.1
Min °F	42.9	45.4	46.8	48.4	50.9	53.6	54.9	55.9	56.1	53.1	47.6	43.0	49.9

Normal Precipitation