TODAY OCT21
TEMPERATURE85
HUMIDITY12
PRESSURE
WIND COND.37 12.3
  • 9360Tue
  • 9061Wed
  • 9163Thu
  • 9359Fri
  • 8755Sat
daynightWeather update from Simi Valley - Cochran at
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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"

Did you know?

  • 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 49% worse than the national average.
  • The pollution index in Portar Ranch is 2653% worse than the national average.

Compare Los Angeles, CA Weather To Other Cities

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 index747455
Pollution index139,490,000139,490,00018,106,726

Portar Ranch air quality information

MeasurementTotal
Days measured365
Days with good air quality25
Days with moderate air quality260
Days w/ poor A.Q. for sensitive groups76
Days with unhealthy air quality4

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.
Piru, CA1,950484%
Westlake Village, CA8,443484%
Bell Canyon, CA2,1597448%
Calabasas, CA24,0917448%
Oak Park, CA14,8857448%
Los Angeles, CA3,918,8727448%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Chicago, IL2,714,0176020%
Houston, TX2,240,582524%
Philadelphia, PA1,559,9385714%
Phoenix, AZ1,555,3247448%
San Antonio, TX1,439,3584510%
Los Angeles, CA3,918,8727448%
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.
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