Montclair, CA Weather - Forecast & Monthly Averages

TEMPERATURE	55
HUMIDITY	100
PRESSURE	101591.66
WIND COND.	260 13

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Weather Quick Facts

The highest monthly average temperature in Montclair for August is 77.8 degrees
The lowest monthly average temperature in Montclair for December is 54.5 degrees
The most monthly precipitation in Montclair occurs in December with 2.6 inches
The air quality index in Montclair is 111% worse than the national average
The pollution index in Montclair is 736% worse than the national average

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Montclair 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	69°F	56°F	2.3"
February	45°F	70°F	57°F	2.0"
March	48°F	74°F	60°F	1.2"
April	51°F	77°F	62°F	0.7"
May	55°F	81°F	66°F	0.4"
June	60°F	88°F	72°F	0.0"
July	65°F	94°F	77°F	0.1"
August	65°F	95°F	78°F	0.0"
September	64°F	93°F	76°F	0.2"
October	57°F	84°F	69°F	0.4"
November	49°F	77°F	62°F	0.6"
December	43°F	68°F	55°F	2.6"

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Montclair 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	Montclair	California	National
Air quality index	89	55	42
Pollution index	22,790,900	10,473,190	2,726,193

Montclair air quality

Measurement	Total
Days measured	365
Days with good air quality	42
Days with moderate air quality	178
Days w/ poor A.Q. for sensitive groups	79
Days with unhealthy air quality	58

Air quality details

Pollutant	Total
Arsenic	0.060%
Benzene	0.190%
Carbon Tetrachloride	0.010%
Lead	0.220%
Mercury	0.230%

Average monthly Montclair temperature with heat index

Montclair monthly precipitation with daily maximum

Montclair monthly snow depth with daily maximum

Montclair monthly wind speed information

Nearby cities with good air quality

City	Population	Air Quality Index	National Avg.
South San Jose Hills, CA	19,104	72	44.0%
West Covina, CA	105,808	72	44.0%
La Habra, CA	62,787	72	44.0%
Azusa, CA	49,584	72	44.0%
Industry, CA	264	72	44.0%
Montclair, CA	40,041	89	78.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Hagerstown, MD	40,027	40	20.0%
Spanish Fork, UT	40,069	46	8.0%
Hilton Head Island, SC	40,000	39	22.0%
Hollister, CA	40,100	37	26.0%
Cape Girardeau, MO	40,100	44	12.0%
Montclair, CA	40,041	89	78.0%

Source: The Montclair, 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.