Mercer County UV ForecastUnited StatesOHMercer CountyHigh7.9CelinaHigh UV, 7.9High7.8Fort RecoveryHigh UV, 7.8High7.9RockfordHigh UV, 7.9High7.9ColdwaterHigh UV, 7.9CarthagenaCelinaChickasawColdwaterEastview ParkFort RecoveryGrand Lake Saint Marys State ParkGrand Lake St Marys SPBHamrick AirportLakefield AirportMaria SteinMendonMercer Wildlife AreaMontezumaMontezuma BayMulholland AirportRockfordSt HenrySt Johns