TODAY APR11
TEMPERATURE53
HUMIDITY
PRESSURE
WIND COND.225 9.6
  • 7544Sun
  • 7445Mon
  • 7044Tue
  • 7243Wed
  • 7244Thu
daynightWeather update from LAS TRAMPAS at

Key findings

  • The highest monthly average temperature in Castle Hill for July is 71 degrees
  • The lowest monthly average temperature in Castle Hill for December is 47 degrees
  • The most monthly precipitation in Castle Hill occurs in January with 3.3 inches
  • The air quality index in Castle Hill is 20% better than the national average
  • The pollution index in Castle Hill is 170% worse than the national average

Compare Castle Hill, CA Weather

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      Castle Hill 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
      January39°F58°F48°F3.3"
      February43°F62°F52°F3.0"
      March45°F67°F54°F1.8"
      April47°F71°F57°F1.9"
      May52°F78°F63°F0.6"
      June56°F85°F68°F0.0"
      July58°F90°F71°F0.0"
      August57°F90°F70°F0.0"
      September56°F86°F68°F0.0"
      October50°F77°F62°F1.4"
      November45°F68°F55°F1.2"
      December40°F57°F47°F2.3"

      Castle Hill 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.
      IndexCastle HillCaliforniaNational
      Air quality index405550
      Pollution index13,698,50018,106,7265,066,862

      Castle Hill air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality290
      Days with moderate air quality74
      Days w/ poor A.Q. for sensitive groups1
      Days with unhealthy air quality0

      Castle Hill air quality information

      PollutantTotal
      Arsenic0.040%
      Benzene0.110%
      Carbon Tetrachloride0.330%
      Lead0.070%
      Mercury0.120%

      Average monthly Castle Hill temperature with heat index

      Castle Hill monthly precipitation with daily maximum

      Castle Hill monthly snow depth with daily maximum

      Castle Hill monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Concord, CA126,9384020%
      North Gate, CA4654020%
      Reliez Valley, CA3,5954020%
      Shell Ridge, CA1,1234020%
      Camino Tassajara, CA3,4564020%
      Castle Hill, CA1,2024020%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Patoka, IN1,2023628%
      Moodus, CT1,2023726%
      Loretto, PA1,2024118%
      Lapwai, ID1,2022942%
      Brookside, AL1,202536%
      Castle Hill, CA1,2024020%
      Source: The Castle Hill, 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.