TODAY NOV07
TEMPERATURE65
HUMIDITY15
PRESSURE101750
WIND COND.355
  • 7550Fri
  • 7652Sat
  • 7151Sun
  • 6951
  • 7052Tue
daynightWeather update from FW0058 Santa Ana Fire at
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Weather Quick Facts

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

Compare Santa Ana, CA Weather

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      Thornton Park 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"

      Thornton Park 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.
      IndexThornton ParkSanta AnaCalifornia
      Air quality index898955
      Pollution index44,192,600858,65210,473,190

      Thornton Park 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
      Arsenic0.002%
      Benzene0.010%
      Carbon Tetrachloride0.000%
      Lead0.020%
      Mercury0.001%

      Average monthly Thornton Park temperature with heat index

      Thornton Park monthly precipitation with daily maximum

      Thornton Park monthly snow depth with daily maximum

      Thornton Park monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Cypress, CA49,1377244.0%
      Lakewood, CA79,6767244.0%
      Norwalk, CA104,5247244.0%
      Westminster, CA90,8577244.0%
      East Whittier, CA10,1827244.0%
      Santa Ana, CA332,6108978.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Riverside, CA327,5698978.0%
      Corpus Christi, TX326,3324216.0%
      Lexington-Fayette, KY322,2004216.0%
      Vaughan, ON321,974n/a 
      Honolulu, HI347,1813040.0%
      Santa Ana, CA332,6108978.0%
      Source: The Thornton Park, Santa Ana, 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.