Walnut, CA Weather Forecast & Monthly Average Temperatures

TEMPERATURE	67
HUMIDITY	80
PRESSURE
WIND COND.	251 4

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"

Did you know?

The highest monthly average temperature in Walnut for August is 77 degrees.
The lowest monthly average temperature in Walnut for December is 53 degrees.
The most monthly precipitation in Walnut occurs in December with 2 inches.
The air quality index in Walnut is 70% worse than the national average.
The pollution index in Walnut is 83% better than the national average.

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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	85	55	50
Pollution index	858,652	18,106,726	5,066,862

Walnut air quality information

Measurement	Total
Days measured	365
Days with good air quality	24
Days with moderate air quality	211
Days w/ poor A.Q. for sensitive groups	102
Days with unhealthy air quality	25

Walnut air quality information

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, State	Population	Air Quality Index	National Avg.
Artesia, CA	16,789	74	48%
Bradbury, CA	954	74	48%
East Pasadena, CA	6,159	74	48%
Fullerton, CA	139,491	74	48%
Industry, CA	266	74	48%
Walnut, CA	30,026	85	70%

Cities with similar population

City, State	Population	Air Quality Index	National Avg.
North Chicago, IL	30,023	35	30%
Rochester, NH	30,052	26	48%
Matthews, NC	30,054	42	16%
Westchester, FL	30,058	41	18%
San Pablo, CA	29,991	43	14%
Walnut, CA	30,026	85	70%

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.