TODAY MAR04
TEMPERATURE40
HUMIDITY89
PRESSURE30.15
WIND COND.20 2.2
  • 6750Thu
  • 7549Fri
  • 6649Sat
  • 6548Sun
  • 6045Mon
daynightWeather update from Simi Valley - Cochran at

Key findings

  • The highest monthly average temperature in Portar Ranch for August is 73 degrees
  • The lowest monthly average temperature in Portar Ranch for December is 57 degrees
  • The most monthly precipitation in Portar Ranch occurs in January with 3.5 inches
  • The air quality index in Portar Ranch is 45% worse than the national average
  • The pollution index in Portar Ranch is 2653% worse than the national average

Compare Los Angeles, CA Weather

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      Portar Ranch 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°F70°F58°F3.5"
      February50°F70°F59°F2.9"
      March52°F72°F61°F1.5"
      April55°F74°F63°F0.7"
      May58°F75°F65°F0.5"
      June61°F78°F68°F0.0"
      July65°F83°F72°F0.0"
      August65°F84°F73°F0.0"
      September64°F85°F72°F0.3"
      October60°F81°F69°F0.7"
      November54°F75°F63°F0.8"
      December48°F69°F57°F2.8"

      Portar Ranch 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.
      IndexPortar RanchLos AngelesCalifornia
      Air quality index727255
      Pollution index139,490,000139,490,00018,106,726

      Portar Ranch air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality66
      Days with moderate air quality208
      Days w/ poor A.Q. for sensitive groups62
      Days with unhealthy air quality28

      Portar Ranch air quality information

      PollutantTotal
      Arsenic0.200%
      Benzene0.950%
      Carbon Tetrachloride0.080%
      Lead1.320%
      Mercury0.440%

      Average monthly Portar Ranch temperature with heat index

      Portar Ranch monthly precipitation with daily maximum

      Portar Ranch monthly snow depth with daily maximum

      Portar Ranch monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Westlake Village, CA8,443468%
      Piru, CA1,950468%
      Burbank CDP, CA4,9847244%
      Calabasas, CA24,0917244%
      Oak Park, CA14,8857244%
      Los Angeles, CA3,918,8727244%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Chicago, IL2,714,0175510%
      Houston, TX2,240,582524%
      Philadelphia, PA1,559,938512%
      Phoenix, AZ1,555,3247448%
      San Antonio, TX1,439,358492%
      Los Angeles, CA3,918,8727244%
      Source: The Portar Ranch, Los Angeles, 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.