Mercer County UV ForecastUnited StatesOHMercer CountyHigh6.5CelinaHigh UV, 6.5High6.6Fort RecoveryHigh UV, 6.6High6.5RockfordHigh UV, 6.5High6.5ColdwaterHigh UV, 6.5CarthagenaCelinaChickasawColdwaterEastview ParkFort RecoveryGrand Lake Saint Marys State ParkGrand Lake St Marys SPBHamrick AirportLakefield AirportMaria SteinMendonMercer Wildlife AreaMontezumaMontezuma BayMulholland AirportRockfordSt HenrySt Johns