Mercer County UV ForecastUnited StatesOHMercer CountyHigh7.7CelinaHigh UV, 7.7High7.4Fort RecoveryHigh UV, 7.4High7.7RockfordHigh UV, 7.7High7.7ColdwaterHigh UV, 7.7CarthagenaCelinaChickasawColdwaterEastview ParkFort RecoveryGrand Lake Saint Marys State ParkGrand Lake St Marys SPBHamrick AirportLakefield AirportMaria SteinMendonMercer Wildlife AreaMontezumaMontezuma BayMulholland AirportRockfordSt HenrySt Johns