Walnut, CA Weather - Forecast & Monthly Averages

TEMPERATURE	50
HUMIDITY	90
PRESSURE
WIND COND.

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Weather Quick Facts

The highest monthly average temperature in Walnut for August is 76.6 degrees
The lowest monthly average temperature in Walnut for December is 53.1 degrees
The most monthly precipitation in Walnut occurs in December with 2 inches
The air quality index in Walnut is 111% worse than the national average
The pollution index in Walnut is 69% better than the national average

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Walnut 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	40°F	70°F	54°F	1.6"
February	41°F	71°F	55°F	1.4"
March	44°F	75°F	58°F	0.8"
April	47°F	78°F	61°F	0.4"
May	52°F	82°F	65°F	0.3"
June	57°F	89°F	71°F	0.0"
July	62°F	94°F	76°F	0.1"
August	61°F	96°F	77°F	0.0"
September	59°F	94°F	74°F	0.1"
October	52°F	86°F	67°F	0.3"
November	44°F	78°F	60°F	0.4"
December	39°F	69°F	53°F	2.0"

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Walnut 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	Walnut	California	National
Air quality index	89	55	42
Pollution index	858,652	10,473,190	2,726,193

Walnut 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	0.002%
Benzene	0.010%
Carbon Tetrachloride	0.000%
Lead	0.020%
Mercury	0.001%

Average monthly Walnut temperature with heat index

Walnut monthly precipitation with daily maximum

Walnut monthly snow depth with daily maximum

Walnut monthly wind speed information

Nearby cities with good air quality

City	Population	Air Quality Index	National Avg.
Rosemead, CA	53,850	72	44.0%
South El Monte, CA	20,791	72	44.0%
Arcadia, CA	57,053	72	44.0%
Baldwin Park, CA	75,659	72	44.0%
La Puente, CA	39,780	72	44.0%
Walnut, CA	29,764	89	78.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Sanford, NC	29,758	29	42.0%
Whitehorse, YT	29,774	n/a
East Lake-Orient Park, FL	29,750	43	14.0%
Parkersburg, WV	29,732	35	30.0%
Leamington, ON	29,703	n/a
Walnut, CA	29,764	89	78.0%

Source: The Walnut, 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.