TODAY NOV23
TEMPERATURE50
HUMIDITY
PRESSURE
WIND COND.124 24.1
  • 6448Sun20%
  • 6653Mon50%60%
  • 6354Tue60%
  • 6750Wed
  • 6950
daynightWeather update from CAMP 9 at
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Weather Quick Facts

  • The highest monthly average temperature in Sylmar for August is 72.5 degrees
  • The lowest monthly average temperature in Sylmar for December is 57 degrees
  • The most monthly precipitation in Sylmar occurs in January with 3.5 inches
  • The air quality index in Sylmar is 71% worse than the national average
  • The pollution index in Sylmar is 5017% worse than the national average

Compare Los Angeles, CA Weather

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      Sylmar 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"

      Sylmar 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.
      IndexSylmarLos AngelesCalifornia
      Air quality index727255
      Pollution index139,490,000139,490,00010,473,190

      Sylmar 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 Sylmar temperature with heat index

      Sylmar monthly precipitation with daily maximum

      Sylmar monthly snow depth with daily maximum

      Sylmar monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Glendale, CA199,3577244.0%
      Calabasas, CA23,8427244.0%
      Santa Susana, CA9247244.0%
      Stevenson Ranch, CA18,9807244.0%
      La Crescenta-Montrose, CA20,1717244.0%
      Los Angeles, CA3,973,2787244.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Toronto, ON3,013,752n/a 
      Chicago, IL2,699,3475510.0%
      Houston, TX2,313,238524.0%
      Montréal, QC1,811,008n/a 
      Phoenix, AZ1,658,4227448.0%
      Los Angeles, CA3,973,2787244.0%
      Source: The Sylmar, 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.