TODAY MAR19
TEMPERATURE43
HUMIDITY39
PRESSURE101520
WIND COND.360 14.8
  • 5738Tue
  • 7142Wed
  • 6341Thu
  • 6147Fri30%60%
  • 6244Sat60%30%
daynightWeather update from Smithfield, Johnston County Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Clayton for July is 79.9 degrees
  • The lowest monthly average temperature in Clayton for January is 41.7 degrees
  • The most monthly precipitation in Clayton occurs in September with 5.5 inches
  • The air quality index in Clayton is 9% worse than the national average
  • The pollution index in Clayton is 92% better than the national average

Compare Clayton, NC Weather

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      Clayton 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
      January31°F55°F42°F2.7"
      February31°F58°F44°F2.6"
      March39°F67°F52°F4.3"
      April48°F76°F62°F4.1"
      May56°F82°F68°F4.1"
      June65°F90°F77°F4.8"
      July69°F93°F80°F5.2"
      August69°F91°F79°F4.9"
      September62°F85°F72°F5.5"
      October49°F75°F61°F3.4"
      November38°F66°F51°F3.8"
      December34°F58°F45°F4.1"

      Clayton 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.
      IndexClaytonNorth CarolinaNational
      Air quality index463542
      Pollution index227,3212,789,5382,726,193

      Clayton air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality239
      Days with moderate air quality126
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Clayton air quality information

      PollutantTotal
      Arsenic0.000%
      Benzene0.003%
      Carbon Tetrachloride0.001%
      Lead0.000%
      Mercury0.000%

      Average monthly Clayton temperature with heat index

      Clayton monthly precipitation with daily maximum

      Clayton monthly snow depth with daily maximum

      Clayton monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Micro, NC6884020.0%
      Smithfield, NC12,6974020.0%
      Four Oaks, NC2,2254020.0%
      Pine Level, NC2,1884020.0%
      Selma, NC6,9504020.0%
      Clayton, NC23,179468.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Bluffton, SC23,1763922.0%
      Oxford, OH23,192688.0%
      Blue Island, IL23,1605510.0%
      Copiague, NY23,200512.0%
      Simpsonville, SC23,200468.0%
      Clayton, NC23,179468.0%
      Source: The Clayton, NC 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.