San Diego, CA Weather - Forecast & Monthly Averages

TEMPERATURE	65
HUMIDITY	48
PRESSURE	101800
WIND COND.

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Weather Quick Facts

The highest monthly average temperature in San Diego for August is 71.1 degrees
The lowest monthly average temperature in San Diego for December is 57.5 degrees
The most monthly precipitation in San Diego occurs in December with 2.2 inches
The air quality index in San Diego is 52% worse than the national average
The pollution index in San Diego is 1581% worse than the national average

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San Diego 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	49°F	68°F	58°F	1.7"
February	51°F	68°F	59°F	1.8"
March	54°F	69°F	60°F	1.0"
April	56°F	70°F	62°F	0.6"
May	60°F	70°F	64°F	0.4"
June	62°F	72°F	66°F	0.0"
July	66°F	76°F	70°F	0.2"
August	67°F	78°F	71°F	0.0"
September	66°F	78°F	71°F	0.2"
October	61°F	77°F	68°F	0.5"
November	55°F	73°F	63°F	0.9"
December	49°F	67°F	58°F	2.2"

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San Diego 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	San Diego	California	National
Air quality index	64	55	42
Pollution index	45,820,500	10,473,190	2,726,193

San Diego air quality

Measurement	Total
Days measured	365
Days with good air quality	87
Days with moderate air quality	253
Days w/ poor A.Q. for sensitive groups	23
Days with unhealthy air quality	2

Air quality details

Pollutant	Total
Arsenic	1.130%
Benzene	0.410%
Carbon Tetrachloride	0.030%
Lead	0.600%
Mercury	0.080%

Average monthly San Diego temperature with heat index

San Diego monthly precipitation with daily maximum

San Diego monthly snow depth with daily maximum

San Diego monthly wind speed information

Nearby cities with good air quality

City	Population	Air Quality Index	National Avg.
Imperial Beach, CA	27,334	64	28.0%
Spring Valley CDP (Lake County), CA	1,154	64	28.0%
El Cajon, CA	103,249	64	28.0%
La Mesa, CA	60,208	64	28.0%
Bonita, CA	12,470	64	28.0%
San Diego, CA	1,414,545	64	28.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Calgary, AB	1,371,990	n/a
Dallas, TX	1,338,846	51	2.0%
San Antonio, TX	1,529,133	49	2.0%
Philadelphia, PA	1,581,531	51	2.0%
Phoenix, AZ	1,658,422	74	48.0%
San Diego, CA	1,414,545	64	28.0%

Source: The San Diego, 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.