TODAY MAR19
TEMPERATURE50
HUMIDITY
PRESSURE101590
WIND COND.330 18.4
  • 6047Tue
  • 7154Wed
  • 6959Thu
  • 6857Fri60%80%
  • 6849Sat50%20%
daynightWeather update from Charleston Executive Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Charleston for July is 81.5 degrees
  • The lowest monthly average temperature in Charleston for January is 49.6 degrees
  • The most monthly precipitation in Charleston occurs in August with 8 inches
  • The air quality index in Charleston is 10% better than the national average
  • The pollution index in Charleston is 71% better than the national average

Compare Charleston, SC Weather

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      Charleston 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°F64°F50°F2.9"
      February39°F66°F51°F3.7"
      March45°F72°F58°F3.1"
      April53°F80°F66°F3.4"
      May62°F85°F73°F3.4"
      June70°F91°F79°F6.6"
      July73°F92°F82°F6.5"
      August73°F91°F81°F8.0"
      September68°F87°F76°F5.9"
      October56°F80°F67°F5.6"
      November45°F72°F57°F2.9"
      December42°F67°F53°F3.7"

      Charleston 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.
      IndexCharlestonSouth CarolinaNational
      Air quality index383742
      Pollution index783,5893,620,4382,726,193

      Charleston air quality information

      MeasurementTotal
      Days measured355
      Days with good air quality299
      Days with moderate air quality55
      Days w/ poor A.Q. for sensitive groups1
      Days with unhealthy air quality0

      Charleston air quality information

      PollutantTotal
      Arsenic0.001%
      Benzene0.010%
      Carbon Tetrachloride0.001%
      Lead0.003%
      Mercury0.000%

      Average monthly Charleston temperature with heat index

      Charleston monthly precipitation with daily maximum

      Charleston monthly snow depth with daily maximum

      Charleston monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Folly Beach, SC2,6643824.0%
      James Island, SC12,1573824.0%
      Seabrook Island, SC1,8103824.0%
      Goose Creek, SC42,9443824.0%
      Kiawah Island, SC1,7723824.0%
      Charleston, SC137,0413824.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Carrollton, TX137,319512.0%
      Waco, TX137,7793824.0%
      Ajax, ON138,303n/a 
      West Valley City, UT135,610512.0%
      Metairie, LA138,5114510.0%
      Charleston, SC137,0413824.0%
      Source: The Charleston, 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.