Mercer County UV ForecastUnited StatesOHMercer CountyHigh6.4CelinaHigh UV, 6.4High6.4Fort RecoveryHigh UV, 6.4High6.4RockfordHigh UV, 6.4High6.4ColdwaterHigh UV, 6.4CarthagenaCelinaChickasawColdwaterEastview ParkFort RecoveryGrand Lake Saint Marys State ParkGrand Lake St Marys SPBHamrick AirportLakefield AirportMaria SteinMendonMercer Wildlife AreaMontezumaMontezuma BayMulholland AirportRockfordSt HenrySt Johns