TODAY NOV21
TEMPERATURE61
HUMIDITY34
PRESSURE100920
WIND COND.280 22.3
  • 5740Fri
  • 6245Sat
  • 6848Sun
  • 7157Mon
  • 7452Tue
daynightWeather update from Beaufort County Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Port Royal for July is 82.4 degrees
  • The lowest monthly average temperature in Port Royal for January is 49.9 degrees
  • The most monthly precipitation in Port Royal occurs in August with 7.7 inches
  • The air quality index in Port Royal is 7% better than the national average
  • The pollution index in Port Royal is 48% better than the national average

Compare Port Royal, SC Weather

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      Port Royal 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
      January40°F62°F50°F2.8"
      February41°F64°F52°F3.8"
      March48°F71°F59°F4.2"
      April56°F79°F67°F3.9"
      May64°F85°F74°F3.5"
      June71°F90°F80°F4.8"
      July74°F93°F82°F4.8"
      August74°F91°F82°F7.7"
      September69°F87°F77°F4.7"
      October59°F79°F68°F3.9"
      November47°F70°F58°F2.1"
      December44°F66°F54°F3.3"

      Port Royal 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.
      IndexPort RoyalSouth CarolinaNational
      Air quality index393742
      Pollution index1,428,3703,620,4382,726,193

      Port Royal air quality

      MeasurementTotal
      Days measured365
      Days with good air quality295
      Days with moderate air quality70
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Air quality details

      PollutantTotal
      Arsenic0.020%
      Benzene0.020%
      Carbon Tetrachloride0.002%
      Lead0.040%
      Mercury0.000%

      Average monthly Port Royal temperature with heat index

      Port Royal monthly precipitation with daily maximum

      Port Royal monthly snow depth with daily maximum

      Port Royal monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Beaufort, SC13,4172942.0%
      Laurel Bay, SC6,3882942.0%
      Burton, SC8,7792942.0%
      Bluffton, SC23,1763922.0%
      Shell Point, SC2,9913922.0%
      Port Royal, SC13,2653922.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Conway, FL13,2663922.0%
      Colchester, Subd. C, NS13,273n/a 
      Richmond Hill, GA13,2503922.0%
      Bellefontaine, OH13,2504510.0%
      Channahon, IL13,2810100.0%
      Port Royal, SC13,2653922.0%
      Source: The Port Royal, 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.