Johnson County UV ForecastUnited StatesARJohnson CountyHigh7.8ClarksvilleHigh UV, 7.8High7.8Coal HillHigh UV, 7.8High7.8KnoxvilleHigh UV, 7.8High7.8OzoneHigh UV, 7.8BatsonClarksvilleClarksville Municipal AirportCoal HillHagarvilleHartmanHuntKnoxvilleLake DardanelleLake LudwigLamarOarkOzone