Lafayette, CA Weather - Forecast & Monthly Averages

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TEMPERATURE	71
HUMIDITY	65
PRESSURE	101620
WIND COND.	285

Weather Quick Facts

The highest monthly average temperature in Lafayette for July is 70.8 degrees
The lowest monthly average temperature in Lafayette for December is 47.3 degrees
The most monthly precipitation in Lafayette occurs in January with 3.3 inches
The air quality index in Lafayette is 5% better than the national average
The pollution index in Lafayette is 604% worse than the national average

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Lafayette 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	39°F	58°F	48°F	3.3"
February	43°F	62°F	52°F	3.0"
March	45°F	67°F	54°F	1.8"
April	47°F	71°F	57°F	1.9"
May	52°F	78°F	63°F	0.6"
June	56°F	85°F	68°F	0.0"
July	58°F	90°F	71°F	0.0"
August	57°F	90°F	70°F	0.0"
September	56°F	86°F	68°F	0.0"
October	50°F	77°F	62°F	1.4"
November	45°F	68°F	55°F	1.2"
December	40°F	57°F	47°F	2.3"

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Lafayette 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	Lafayette	California	National
Air quality index	40	55	42
Pollution index	19,202,400	10,473,190	2,726,193

Lafayette air quality

Measurement	Total
Days measured	365
Days with good air quality	290
Days with moderate air quality	74
Days w/ poor A.Q. for sensitive groups	1
Days with unhealthy air quality	0

Air quality details

Pollutant	Total
Arsenic	0.180%
Benzene	0.140%
Carbon Tetrachloride	0.010%
Lead	0.280%
Mercury	0.060%

Average monthly Lafayette temperature with heat index

Lafayette monthly precipitation with daily maximum

Lafayette monthly snow depth with daily maximum

Lafayette monthly wind speed information

Nearby cities with good air quality

City	Population	Air Quality Index	National Avg.
Alhambra Valley, CA	1,079	40	20.0%
Martinez, CA	39,841	40	20.0%
Pleasant Hill, CA	35,995	40	20.0%
Saranap, CA	6,163	40	20.0%
Blackhawk, CA	10,905	40	20.0%
Lafayette, CA	26,574	40	20.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Green, OH	26,538	43	14.0%
Columbine, CO	26,527	58	16.0%
Moscow, ID	26,621	10	80.0%
South Portland, ME	26,521	40	20.0%
Northport, AL	26,634	35	30.0%
Lafayette, CA	26,574	40	20.0%

Source: The Lafayette, 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.