TODAY NOV25
TEMPERATURE71
HUMIDITY45
PRESSURE101964.16
WIND COND.220 16.7
  • 6939Tue30%
  • 6249Wed30%
  • 663970%50%
  • 5127Fri
  • 4830Sat
daynightWeather update from Union County Airport - Troy Shelton Field at
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Weather Quick Facts

  • The highest monthly average temperature in Union for July is 78.9 degrees
  • The lowest monthly average temperature in Union for January is 42.7 degrees
  • The most monthly precipitation in Union occurs in December with 5.6 inches
  • The air quality index in Union is 5% worse than the national average
  • The pollution index in Union is 37% better than the national average

Compare Union, SC Weather

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      Union 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°F56°F43°F4.0"
      February33°F59°F45°F3.1"
      March40°F68°F53°F4.3"
      April48°F76°F62°F4.1"
      May57°F82°F69°F3.9"
      June66°F90°F77°F3.8"
      July69°F92°F79°F5.1"
      August69°F90°F78°F4.8"
      September63°F85°F72°F3.8"
      October50°F76°F62°F4.0"
      November39°F66°F52°F3.3"
      December35°F58°F46°F5.6"

      Union 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.
      IndexUnionSouth CarolinaNational
      Air quality index443742
      Pollution index1,726,8503,620,4382,726,193

      Union air quality

      MeasurementTotal
      Days measured357
      Days with good air quality249
      Days with moderate air quality106
      Days w/ poor A.Q. for sensitive groups2
      Days with unhealthy air quality0

      Air quality details

      PollutantTotal
      Arsenic0.001%
      Benzene0.010%
      Carbon Tetrachloride0.003%
      Lead0.004%
      Mercury0.000%

      Average monthly Union temperature with heat index

      Union monthly precipitation with daily maximum

      Union monthly snow depth with daily maximum

      Union monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Carlisle, SC5713628.0%
      Lockhart, SC4273628.0%
      Cross Anchor, SC704412.0%
      Central Pacolet, SC2804412.0%
      Jonesville, SC9384412.0%
      Union, SC7,7164412.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Wellington, KS7,7164020.0%
      Fort Scott, KS7,7153726.0%
      Waite Park, MN7,7193236.0%
      Leola, PA7,7204510.0%
      Citrus Hills, FL7,7113040.0%
      Union, SC7,7164412.0%
      Source: The Union, 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.