Foster City, CA Weather - Forecast & Monthly Averages

TEMPERATURE	55
HUMIDITY	100
PRESSURE	102070
WIND COND.	10 9.4

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Weather Quick Facts

The highest monthly average temperature in Foster City for September is 63.3 degrees
The lowest monthly average temperature in Foster City for January is 50.7 degrees
The most monthly precipitation in Foster City occurs in December with 4.4 inches
The air quality index in Foster City is 2% worse than the national average
The pollution index in Foster City is 254% worse than the national average

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Foster City Average Temperature

In the event that the weather data was unavailable for this city, estimates based upon nearby cities were used.
Month	Temp. _(min)	Temp. _(max)	Temp. _(avg)	Precipitation
January	44°F	58°F	51°F	3.2"
February	46°F	62°F	53°F	3.4"
March	47°F	64°F	54°F	2.7"
April	49°F	67°F	56°F	1.7"
May	51°F	69°F	58°F	0.3"
June	54°F	72°F	61°F	0.2"
July	56°F	73°F	62°F	0.0"
August	56°F	73°F	62°F	0.0"
September	56°F	76°F	63°F	0.1"
October	54°F	73°F	62°F	1.0"
November	49°F	65°F	56°F	1.7"
December	44°F	58°F	51°F	4.4"

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Foster City air quality index & pollution index

In the event that the air quality/pollution data was unavailable for this city, estimates based upon nearby cities were used.
Index	Foster City	California	National
Air quality index	43	55	42
Pollution index	9,645,610	10,473,190	2,726,193

Foster City air quality

Measurement	Total
Days measured	365
Days with good air quality	263
Days with moderate air quality	98
Days w/ poor A.Q. for sensitive groups	4
Days with unhealthy air quality	0

Air quality details

Pollutant	Total
Arsenic	0.140%
Benzene	0.070%
Carbon Tetrachloride	0.000%
Lead	0.100%
Mercury	0.020%

Average monthly Foster City temperature with heat index

Foster City monthly precipitation with daily maximum

Foster City monthly snow depth with daily maximum

Foster City monthly wind speed information

Nearby cities with good air quality

City	Population	Air Quality Index	National Avg.
Castro Valley, CA	64,392	40	20.0%
San Lorenzo, CA	30,117	40	20.0%
San Francisco, CA	874,784	40	20.0%
San Ramon, CA	81,344	40	20.0%
Alameda, CA	79,827	40	20.0%
Foster City, CA	33,056	43	14.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Houma, LA	33,053	41	18.0%
Fruit Cove, FL	33,038	43	14.0%
Douglasville, GA	33,035	52	4.0%
Andover, MN	33,019	46	8.0%
Fair Lawn, NJ	32,986	51	2.0%
Foster City, CA	33,056	43	14.0%

Source: The Foster City, CA weather data displayed above is derived from the NOAA (National Oceanic and Atmospheric). Air quality and pollution data is derived from the EPA (United States Environmental Protection Agency). Air quality and pollution levels measured in a particular area may not be representative of the entire county.