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Key findings

  • The highest monthly average temperature in Castroville for September is 60 degrees
  • The lowest monthly average temperature in Castroville for December is 50 degrees
  • The most monthly precipitation in Castroville occurs in April with 20.7 inches
  • The air quality index in Castroville is 26% better than the national average
  • The pollution index in Castroville is 90% worse than the national average

Compare Castroville, CA Weather

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      Castroville 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°F11.2"
      February45°F61°F52°F3.4"
      March46°F62°F53°F1.1"
      April46°F62°F53°F20.7"
      May49°F62°F55°F0.1"
      June52°F64°F57°F0.0"
      July54°F64°F58°F0.0"
      August54°F65°F59°F0.0"
      September54°F68°F60°F0.0"
      October52°F69°F59°F0.3"
      November48°F65°F55°F0.6"
      December44°F60°F50°F0.1"

      Castroville 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.
      IndexCastrovilleCaliforniaNational
      Air quality index375550
      Pollution index9,602,13018,106,7265,066,862

      Castroville air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality330
      Days with moderate air quality34
      Days w/ poor A.Q. for sensitive groups1
      Days with unhealthy air quality0

      Castroville air quality information

      PollutantTotal
      Arsenic0.070%
      Benzene0.190%
      Carbon Tetrachloride0.000%
      Lead0.080%
      Mercury0.070%

      Average monthly Castroville temperature with heat index

      Castroville monthly precipitation with daily maximum

      Castroville monthly snow depth with daily maximum

      Castroville monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Interlaken, CA6,7383530%
      Pajaro Dunes, CA2113530%
      Amesti, CA3,2053530%
      Capitola, CA10,1093530%
      La Selva Beach, CA2,6333530%
      Castroville, CA6,9783726%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      La Junta, CO6,9782060%
      Norwich, NY6,9792746%
      Litchfield, IL6,9764020%
      Strathmore, NJ6,975512%
      Mechanicstown, NY6,9823628%
      Castroville, CA6,9783726%
      Source: The Castroville, 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.