TODAY DEC22
TEMPERATURE53
HUMIDITY68
PRESSURE
WIND COND.355
  • 6750Sun
  • 7051Mon
  • 6547Tue50%40%
  • 6447
  • 6547Thu
daynightWeather update from CW5283 Foothill Ranch at
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Weather Quick Facts

  • The highest monthly average temperature in Lake Forest for August is 72.2 degrees
  • The lowest monthly average temperature in Lake Forest for December is 57 degrees
  • The most monthly precipitation in Lake Forest occurs in December with 2.4 inches
  • The air quality index in Lake Forest is 111% worse than the national average
  • The pollution index in Lake Forest is 1521% worse than the national average

Compare Lake Forest, CA Weather

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      Lake Forest 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"

      Lake Forest 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.
      IndexLake ForestCaliforniaNational
      Air quality index895542
      Pollution index44,192,60010,473,1902,726,193

      Lake Forest air quality

      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

      Air quality details

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

      Average monthly Lake Forest temperature with heat index

      Lake Forest monthly precipitation with daily maximum

      Lake Forest monthly snow depth with daily maximum

      Lake Forest monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Dana Point, CA33,7828978.0%
      San Clemente, CA64,9298978.0%
      Rancho Santa Margarita, CA48,2808978.0%
      Laguna Hills, CA31,6138978.0%
      Mission Viejo, CA95,6388978.0%
      Lake Forest, CA84,6668978.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Largo, FL84,6664314.0%
      Danbury, CT84,6504314.0%
      Hemet, CA84,6868978.0%
      Bloomington, IN84,6914216.0%
      New Braunfels, TX84,622492.0%
      Lake Forest, CA84,6668978.0%
      Source: The Lake Forest, 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.