Mercer County UV ForecastUnited StatesOHMercer CountyHigh7.1CelinaHigh UV, 7.1High7.1Fort RecoveryHigh UV, 7.1High7.1RockfordHigh UV, 7.1High7.1ColdwaterHigh UV, 7.1CarthagenaCelinaChickasawColdwaterEastview ParkFort RecoveryGrand Lake Saint Marys State ParkGrand Lake St Marys SPBHamrick AirportLakefield AirportMaria SteinMendonMercer Wildlife AreaMontezumaMontezuma BayMulholland AirportRockfordSt HenrySt Johns