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Key findings

  • The highest monthly average temperature in San Juan Capistrano for August is 72 degrees
  • The lowest monthly average temperature in San Juan Capistrano for December is 57 degrees
  • The most monthly precipitation in San Juan Capistrano occurs in December with 2.4 inches
  • The air quality index in San Juan Capistrano is 79% worse than the national average
  • The pollution index in San Juan Capistrano is 772% worse than the national average

Compare San Juan Capistrano, CA Weather

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      San Juan Capistrano 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
      January48°F69°F57°F2.3"
      February49°F69°F58°F1.9"
      March52°F70°F60°F0.9"
      April54°F72°F62°F0.6"
      May59°F73°F65°F0.3"
      June62°F76°F67°F0.0"
      July66°F80°F71°F0.1"
      August66°F82°F72°F0.0"
      September65°F82°F72°F0.2"
      October60°F79°F68°F0.5"
      November54°F75°F63°F0.7"
      December48°F68°F57°F2.4"

      San Juan Capistrano 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.
      IndexSan Juan CapistranoCaliforniaNational
      Air quality index895550
      Pollution index44,192,60018,106,7265,066,862

      San Juan Capistrano air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality42
      Days with moderate air quality178
      Days w/ poor A.Q. for sensitive groups79
      Days with unhealthy air quality58

      San Juan Capistrano air quality information

      PollutantTotal
      Arsenic0.030%
      Benzene0.280%
      Carbon Tetrachloride0.001%
      Lead0.220%
      Mercury0.140%

      Average monthly San Juan Capistrano temperature with heat index

      San Juan Capistrano monthly precipitation with daily maximum

      San Juan Capistrano monthly snow depth with daily maximum

      San Juan Capistrano monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Dana Point, CA34,0098978%
      San Clemente, CA65,0828978%
      Costa Mesa, CA112,4398978%
      Las Flores, CA5,6718978%
      Ladera Ranch, CA27,1218978%
      San Juan Capistrano, CA36,0068978%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Del Rio, TX36,0072550%
      San Juan, TX35,9834216%
      Leavenworth, KS35,948476%
      Richmond, IN36,082688%
      Temple City, CA36,0847244%
      San Juan Capistrano, CA36,0068978%
      Source: The San Juan Capistrano, 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.