Cajon, San Bernardino, CA Weather - Forecast & Monthly Averages

TEMPERATURE	51
HUMIDITY	71
PRESSURE	101950
WIND COND.	360

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Weather Quick Facts

The highest monthly average temperature in Cajon for August is 77.8 degrees
The lowest monthly average temperature in Cajon for December is 55.1 degrees
The most monthly precipitation in Cajon occurs in December with 1.9 inches
The air quality index in Cajon is 111% worse than the national average
The pollution index in Cajon is 1058% worse than the national average

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Cajon 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	70°F	56°F	1.6"
February	45°F	72°F	57°F	1.2"
March	47°F	75°F	60°F	0.7"
April	50°F	78°F	63°F	0.5"
May	55°F	82°F	66°F	0.2"
June	59°F	89°F	72°F	0.0"
July	65°F	94°F	77°F	0.2"
August	65°F	95°F	78°F	0.1"
September	63°F	94°F	76°F	0.2"
October	56°F	85°F	69°F	0.2"
November	49°F	77°F	62°F	0.5"
December	44°F	69°F	55°F	1.9"

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Cajon 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	Cajon	San Bernardino	California
Air quality index	89	89	55
Pollution index	31,575,300	31,575,300	10,473,190

Cajon 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	0.110%
Benzene	0.260%
Carbon Tetrachloride	0.020%
Lead	0.350%
Mercury	0.280%

Average monthly Cajon temperature with heat index

Cajon monthly precipitation with daily maximum

Cajon monthly snow depth with daily maximum

Cajon monthly wind speed information

Nearby cities with good air quality

City	Population	Air Quality Index	National Avg.
Colton, CA	54,215	89	78.0%
Loma Linda, CA	24,239	89	78.0%
Crestline, CA	9,351	89	78.0%
Muscoy, CA	11,546	89	78.0%
Lake Arrowhead, CA	9,741	89	78.0%
San Bernardino, CA	216,784	89	78.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Tacoma, WA	215,766	18	64.0%
Des Moines, IA	215,408	39	22.0%
Richmond Hill, ON	215,407	n/a
Spring Valley, NV	218,697	54	8.0%
Enterprise, NV	214,591	54	8.0%
San Bernardino, CA	216,784	89	78.0%

Source: The Cajon, San Bernardino, 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.