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Key findings

  • The highest monthly average temperature in San Clemente for August is 68.3 degrees
  • The lowest monthly average temperature in San Clemente for December is 55.3 degrees
  • The most monthly precipitation in San Clemente occurs in December with 7.2 inches
  • The air quality index in San Clemente is 79% worse than the national average
  • The pollution index in San Clemente is 772% worse than the national average

Compare San Clemente, CA Weather

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      San Clemente 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°F66°F56°F5.1"
      February48°F64°F56°F4.2"
      March51°F66°F58°F2.4"
      April53°F68°F60°F1.6"
      May54°F67°F58°F2.3"
      June58°F69°F60°F0.1"
      July63°F72°F67°F0.5"
      August63°F75°F68°F1.0"
      September62°F75°F68°F0.1"
      October58°F71°F64°F2.0"
      November52°F68°F59°F2.6"
      December49°F64°F55°F7.2"

      San Clemente 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 ClementeCaliforniaNational
      Air quality index895550
      Pollution index44,192,60018,106,7265,066,862

      San Clemente 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 Clemente air quality information

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

      Average monthly San Clemente temperature with heat index

      San Clemente monthly precipitation with daily maximum

      San Clemente monthly snow depth with daily maximum

      San Clemente monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Dana Point, CA34,0098978%
      San Juan Capistrano, CA36,0068978%
      Lakeland Village, CA11,6988978%
      Las Flores CDP (Tehama County), CA3248978%
      Ladera Ranch, CA27,1218978%
      San Clemente, CA65,0828978%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Delray Beach, FL65,0444118%
      Youngstown, OH65,1614216%
      Rockville, MD65,171476%
      Laguna Niguel, CA64,9848978%
      Marysville, WA64,9552452%
      San Clemente, CA65,0828978%
      Source: The San Clemente, 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.