Mercer County UV ForecastUnited StatesOHMercer CountyHigh7.3CelinaHigh UV, 7.3Very high8Fort RecoveryVery high UV, 8High7.3RockfordHigh UV, 7.3High7.3ColdwaterHigh UV, 7.3CarthagenaCelinaChickasawColdwaterEastview ParkFort RecoveryGrand Lake Saint Marys State ParkGrand Lake St Marys SPBHamrick AirportLakefield AirportMaria SteinMendonMercer Wildlife AreaMontezumaMontezuma BayMulholland AirportRockfordSt HenrySt Johns