Atherton, CA Weather - Forecast & Monthly Averages

TEMPERATURE	54
HUMIDITY	78
PRESSURE
WIND COND.	268 6.4

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Weather Quick Facts

The highest monthly average temperature in Atherton for July is 66.7 degrees
The lowest monthly average temperature in Atherton for January is 50.4 degrees
The most monthly precipitation in Atherton occurs in December with 2.6 inches
The air quality index in Atherton is 2% worse than the national average
The pollution index in Atherton is 254% worse than the national average

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Atherton 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	42°F	61°F	50°F	2.4"
February	45°F	63°F	53°F	2.4"
March	47°F	67°F	56°F	2.0"
April	49°F	70°F	58°F	1.3"
May	53°F	73°F	61°F	0.3"
June	56°F	77°F	65°F	0.2"
July	59°F	78°F	67°F	0.0"
August	59°F	78°F	66°F	0.0"
September	57°F	80°F	67°F	0.1"
October	53°F	75°F	63°F	0.7"
November	47°F	67°F	56°F	1.3"
December	42°F	60°F	51°F	2.6"

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Atherton 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	Atherton	California	National
Air quality index	43	55	42
Pollution index	9,645,610	10,473,190	2,726,193

Atherton air quality information

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

Atherton air quality information

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

Average monthly Atherton temperature with heat index

Atherton monthly precipitation with daily maximum

Atherton monthly snow depth with daily maximum

Atherton monthly wind speed information

Nearby cities with good air quality

City	Population	Air Quality Index	National Avg.
Pescadero, CA	418	35	30.0%
Loma Mar, CA	282	35	30.0%
South San Francisco, CA	66,878	40	20.0%
San Lorenzo, CA	30,117	40	20.0%
Hayward, CA	158,817	43	14.0%
Atherton, CA	7,060	43	14.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Grove, OK	7,060	38	24.0%
Morrow, GA	7,061	52	4.0%
Clinton, MA	7,058	40	20.0%
Clarkston Heights-Vineland, WA	7,062	29	42.0%
Bremen, GA	7,057	44	12.0%
Atherton, CA	7,060	43	14.0%

Source: The Atherton, 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.