Mercer County UV ForecastUnited StatesOHMercer CountyHigh7.8CelinaHigh UV, 7.8High7.7Fort RecoveryHigh UV, 7.7High7.8RockfordHigh UV, 7.8High7.8ColdwaterHigh UV, 7.8CarthagenaCelinaChickasawColdwaterEastview ParkFort RecoveryGrand Lake Saint Marys State ParkGrand Lake St Marys SPBHamrick AirportLakefield AirportMaria SteinMendonMercer Wildlife AreaMontezumaMontezuma BayMulholland AirportRockfordSt HenrySt Johns