TODAY DEC13
TEMPERATURE
HUMIDITY
PRESSURE
WIND COND.
  • 7448Fri
  • 6447Sat20%20%
  • 6444Sun
  • 6846Mon
  • 6746Tue
daynightWeather update from EW4858 El Cajon at
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Rancho San Diego Average Temperature

In the event that the weather data was unavailable for this city, estimates based upon nearby cities were used.
MonthTemp. (min)Temp. (max)Temp. (avg)Precipitation
January45°F69°F56°F1.9"
February47°F69°F57°F2.2"
March50°F70°F59°F1.0"
April53°F72°F61°F0.7"
May57°F72°F63°F0.4"
June61°F76°F66°F0.0"
July65°F80°F71°F0.2"
August66°F82°F72°F0.0"
September64°F83°F72°F0.2"
October58°F80°F68°F0.5"
November51°F74°F62°F0.9"
December46°F68°F56°F2.5"

Did you know?

  • The highest monthly average temperature in Rancho San Diego for August is 72 degrees.
  • The lowest monthly average temperature in Rancho San Diego for December is 56 degrees.
  • The most monthly precipitation in Rancho San Diego occurs in December with 2.5 inches.
  • The air quality index in Rancho San Diego is 23% worse than the national average.
  • The pollution index in Rancho San Diego is 97% better than the national average.

Compare Rancho San Diego, CA Weather To Other Cities

Rancho 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.
IndexRancho San DiegoCaliforniaNational
Air quality index615550
Pollution index162,74018,106,7265,066,862

Rancho San Diego air quality information

MeasurementTotal
Days measured365
Days with good air quality69
Days with moderate air quality277
Days w/ poor A.Q. for sensitive groups17
Days with unhealthy air quality1

Rancho San Diego air quality information

PollutantTotal
Arsenic0.000%
Benzene0.003%
Carbon Tetrachloride0.000%
Lead0.000%
Mercury0.000%

Average monthly Rancho San Diego temperature with heat index

Rancho San Diego monthly precipitation with daily maximum

Rancho San Diego monthly snow depth with daily maximum

Rancho San Diego monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Bonita, CA12,8856122%
Crest, CA2,7336122%
Harbison Canyon, CA4,1286122%
La Mesa, CA59,1256122%
San Diego, CA1,374,8126122%
Rancho San Diego, CA22,0186122%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Union Hill-Novelty Hill, WA22,015492%
Watertown, SD22,0263628%
Willowbrook, CA22,0357448%
South Holland, IL22,0406020%
Hunters Creek, FL21,9883628%
Rancho San Diego, CA22,0186122%
Source: The Rancho 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.
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