San Ysidro, San Diego, CA Weather - Forecast & Monthly Averages

TEMPERATURE	54
HUMIDITY	55
PRESSURE	101900
WIND COND.

New Real Estate Listings in San Ysidro Area

For Sale For Rent

Search

Search Homes for Sale in San Diego, CA

Weather Quick Facts

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

Compare San Diego, CA Weather

Write a review to give others more information about this area.

See all San Ysidro poll results

San Ysidro 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"

The best places in California

Here are the best places to live in California

See the best places to live in San Diego

Most Dangerous States In The US

Safest States In The US

San Ysidro 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 Ysidro	San Diego	California
Air quality index	64	64	55
Pollution index	45,820,500	45,820,500	10,473,190

San Ysidro 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 Ysidro temperature with heat index

San Ysidro monthly precipitation with daily maximum

San Ysidro monthly snow depth with daily maximum

San Ysidro monthly wind speed information

Nearby cities with good air quality

City	Population	Air Quality Index	National Avg.
Chula Vista, CA	268,779	64	28.0%
La Presa, CA	37,410	64	28.0%
Spring Valley, CA	31,866	64	28.0%
Coronado, CA	24,526	64	28.0%
Lemon Grove, CA	26,739	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 Ysidro, 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.