Mercer County UV ForecastUnited StatesOHMercer CountyHigh6.6CelinaHigh UV, 6.6High6.6Fort RecoveryHigh UV, 6.6High6.6RockfordHigh UV, 6.6High6.6ColdwaterHigh UV, 6.6CarthagenaCelinaChickasawColdwaterEastview ParkFort RecoveryGrand Lake Saint Marys State ParkGrand Lake St Marys SPBHamrick AirportLakefield AirportMaria SteinMendonMercer Wildlife AreaMontezumaMontezuma BayMulholland AirportRockfordSt HenrySt Johns