Barnwell County UV ForecastUnited StatesSCBarnwell CountyVery high10.9BarnwellVery high UV, 10.9Very high10.9WillistonVery high UV, 10.9Very high10.9BlackvilleVery high UV, 10.9BarnwellBarnwell Regional AirportBarnwell State ParkBlackvilleElkoHildaKlinePar PondSnellingWilliston