Mercer County UV ForecastUnited StatesOHMercer CountyLow2.5CelinaLow UV, 2.5Low2.5Fort RecoveryLow UV, 2.5Low2.5RockfordLow UV, 2.5Low2.5ColdwaterLow UV, 2.5CarthagenaCelinaChickasawColdwaterEastview ParkFort RecoveryGrand Lake Saint Marys State ParkGrand Lake St Marys SPBHamrick AirportLakefield AirportMaria SteinMendonMercer Wildlife AreaMontezumaMontezuma BayMulholland AirportRockfordSt HenrySt Johns