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Key findings

  • The highest monthly average temperature in Clay for July is 74 degrees
  • The lowest monthly average temperature in Clay for January is 47 degrees
  • The most monthly precipitation in Clay occurs in December with 3.8 inches
  • The air quality index in Clay is 5% worse than the national average
  • The pollution index in Clay is 205% worse than the national average

Compare Clay, CA Weather

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      Clay 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
      January38°F58°F47°F3.3"
      February41°F63°F51°F3.1"
      March44°F68°F55°F2.9"
      April47°F74°F59°F1.8"
      May52°F82°F65°F0.5"
      June57°F90°F71°F0.3"
      July59°F95°F74°F0.0"
      August58°F93°F73°F0.0"
      September56°F90°F70°F0.1"
      October50°F79°F63°F1.2"
      November43°F66°F53°F1.6"
      December38°F57°F47°F3.8"

      Clay 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.
      IndexClayCaliforniaNational
      Air quality index525550
      Pollution index15,476,50018,106,7265,066,862

      Clay air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality171
      Days with moderate air quality173
      Days w/ poor A.Q. for sensitive groups21
      Days with unhealthy air quality0

      Clay air quality information

      PollutantTotal
      Arsenic0.090%
      Benzene0.130%
      Carbon Tetrachloride0.010%
      Lead0.130%
      Mercury0.070%

      Average monthly Clay temperature with heat index

      Clay monthly precipitation with daily maximum

      Clay monthly snow depth with daily maximum

      Clay monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Dogtown, CA2,4604510%
      Collierville, CA2,3184510%
      Lockeford, CA3,2814510%
      Buena Vista, CA3604510%
      Lodi, CA63,8424510%
      Clay, CA1,209524%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Markle, IN1,2093138%
      Cottage City, MD1,209476%
      Branchville, SC1,2092942%
      Lenape Heights, PA1,2093824%
      Celoron, NY1,2093726%
      Clay, CA1,209524%
      Source: The Clay, 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.