TODAY MAY10
TEMPERATURE59
HUMIDITY83
PRESSURE
WIND COND.341 1.6
  • 7354Mon
  • 7755Tue
  • 7856Wed
  • 7956Thu
  • 7955Fri
daynightWeather update from EW4858 El Cajon at

Key findings

  • The highest monthly average temperature in El Cajon for August is 72.2 degrees
  • The lowest monthly average temperature in El Cajon for December is 55.8 degrees
  • The most monthly precipitation in El Cajon occurs in December with 2.5 inches
  • The air quality index in El Cajon is 29% worse than the national average
  • The pollution index in El Cajon is 97% better than the national average

Compare El Cajon, CA Weather

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      El Cajon 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"

      El 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.
      IndexEl CajonCaliforniaNational
      Air quality index645550
      Pollution index162,74018,106,7265,066,862

      El Cajon air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality87
      Days with moderate air quality253
      Days w/ poor A.Q. for sensitive groups23
      Days with unhealthy air quality2

      El Cajon air quality information

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

      Average monthly El Cajon temperature with heat index

      El Cajon monthly precipitation with daily maximum

      El Cajon monthly snow depth with daily maximum

      El Cajon monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Chula Vista, CA260,5986428%
      Lemon Grove, CA26,4216428%
      Spring Valley, CA30,1286428%
      Crest, CA2,7336428%
      Lakeside, CA21,4886428%
      El Cajon, CA102,8946428%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Spring Hill, FL102,9293040%
      Lakeland, FL102,7143628%
      Rialto, CA102,4188978%
      Columbia, MD103,439468%
      Lewisville, TX102,327512%
      El Cajon, CA102,8946428%
      Source: The El Cajon, 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.