TODAY MAY14
TEMPERATURE54
HUMIDITY93
PRESSURE
WIND COND.240 1.6
  • 7548Fri
  • 6949Sat
  • 6649Sun
  • 7451Mon
  • 7753Tue
daynightWeather update from DEL VALLE at

Key findings

  • The highest monthly average temperature in Castaic for July is 78.7 degrees
  • The lowest monthly average temperature in Castaic for January is 51.6 degrees
  • The most monthly precipitation in Castaic occurs in September with 28.1 inches
  • The air quality index in Castaic is 45% worse than the national average
  • The pollution index in Castaic is 2653% worse than the national average

Compare Castaic, CA Weather

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      Castaic 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"

      Castaic 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.
      IndexCastaicCaliforniaNational
      Air quality index725550
      Pollution index139,490,00018,106,7265,066,862

      Castaic 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

      Castaic air quality information

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

      Average monthly Castaic temperature with heat index

      Castaic monthly precipitation with daily maximum

      Castaic monthly snow depth with daily maximum

      Castaic monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Piru, CA1,950468%
      Moorpark, CA35,594468%
      Santa Susana, CA1,0577244%
      Simi Valley, CA126,1267244%
      Santa Clarita, CA180,3037244%
      Castaic, CA19,5297244%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      McKeesport, PA19,5295612%
      Bryant, AR19,5294510%
      Clemmons, NC19,5364510%
      Upper St. Clair, PA19,5215612%
      Papillion, NE19,5204020%
      Castaic, CA19,5297244%
      Source: The Castaic, 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.