TODAY NOV09
TEMPERATURE53
HUMIDITY28
PRESSURE
WIND COND.52 6.4
  • 7545Sat
  • 7544Sun
  • 714420%
  • 7145Tue
  • 7849Wed
daynightWeather update from DEL VALLE at
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Weather Quick Facts

  • The highest monthly average temperature in Stevenson Ranch for July is 78.7 degrees
  • The lowest monthly average temperature in Stevenson Ranch for January is 51.6 degrees
  • The most monthly precipitation in Stevenson Ranch occurs in September with 28.1 inches
  • The air quality index in Stevenson Ranch is 71% worse than the national average
  • The pollution index in Stevenson Ranch is 5017% worse than the national average

Compare Stevenson Ranch, CA Weather

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      Stevenson 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
      January45°F62°F52°F19.1"
      February46°F65°F54°F5.8"
      March47°F69°F56°F3.2"
      April47°F73°F58°F3.0"
      May53°F79°F64°F0.6"
      June59°F87°F71°F0.0"
      July65°F96°F79°F0.0"
      August63°F94°F76°F0.0"
      September61°F90°F74°F28.1"
      October57°F81°F67°F5.9"
      November53°F74°F61°F1.3"
      December44°F63°F52°F4.0"

      Stevenson 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.
      IndexStevenson RanchCaliforniaNational
      Air quality index725542
      Pollution index139,490,00010,473,1902,726,193

      Stevenson Ranch air quality

      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

      Air quality details

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

      Average monthly Stevenson Ranch temperature with heat index

      Stevenson Ranch monthly precipitation with daily maximum

      Stevenson Ranch monthly snow depth with daily maximum

      Stevenson Ranch monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Piru, CA2,126468.0%
      Thousand Oaks, CA127,648468.0%
      Burbank, CA103,4117244.0%
      Oak Park, CA13,9877244.0%
      Hasley Canyon, CA1,4337244.0%
      Stevenson Ranch, CA18,9807244.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Cimarron Hills, CO18,9814510.0%
      Altamont, OR18,9822942.0%
      Lexington, NC18,9704020.0%
      Troy, AL18,995524.0%
      Sainte-Catherine, QC19,000n/a 
      Stevenson Ranch, CA18,9807244.0%
      Source: The Stevenson Ranch, 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.