TODAY SEP24
TEMPERATURE69
HUMIDITY49
PRESSURE30.16
WIND COND.60 16.6
  • 7854Sat
  • 7955Sun
  • 8258Mon
  • 8561Tue
  • 8562Wed
daynightWeather update from Anderson, Anderson County Airport at

Key findings

  • The highest monthly average temperature in Williamston for August is 79.6 degrees
  • The lowest monthly average temperature in Williamston for January is 43.2 degrees
  • The most monthly precipitation in Williamston occurs in December with 6.2 inches
  • The air quality index in Williamston is 38% better than the national average
  • The pollution index in Williamston is 69% better than the national average

Compare Williamston, SC Weather

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      Williamston 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
      January33°F55°F43°F4.5"
      February34°F56°F44°F3.6"
      March41°F66°F53°F4.7"
      April49°F74°F61°F3.4"
      May58°F80°F69°F4.0"
      June67°F89°F77°F4.0"
      July70°F90°F79°F4.5"
      August71°F91°F80°F3.4"
      September64°F84°F73°F3.4"
      October52°F73°F62°F4.1"
      November41°F64°F52°F3.1"
      December36°F56°F45°F6.2"

      Williamston 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.
      IndexWilliamstonSouth CarolinaNational
      Air quality index313750
      Pollution index1,548,7303,325,3185,066,862

      Williamston air quality information

      MeasurementTotal
      Days measured250
      Days with good air quality248
      Days with moderate air quality2
      Days w/ poor A.Q. for sensitive groups
      Days with unhealthy air quality

      Williamston air quality information

      PollutantTotal
      Arsenic0.003%
      Benzene0.020%
      Carbon Tetrachloride0.004%
      Lead0.030%
      Mercury0.001%

      Average monthly Williamston temperature with heat index

      Williamston monthly precipitation with daily maximum

      Williamston monthly snow depth with daily maximum

      Williamston monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Princeton, SC353138%
      Pelzer, SC1,2253138%
      Homeland Park, SC5,9523138%
      Anderson, SC27,2063138%
      Honea Path, SC3,6833138%
      Williamston, SC4,0933138%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Grayson, KY4,0934216%
      Mullica Hill, NJ4,092512%
      Walthourville, GA4,0913922%
      Guerneville, CA4,0953432%
      Nassau Bay, TX4,091524%
      Williamston, SC4,0933138%
      Source: The Williamston, SC 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.