Mercer County Weather ForecastUnited StatesOHMercer County5981CelinaMostly Cloudy5980Fort RecoveryMostly Cloudy5881RockfordPartly Sunny5981ColdwaterMostly CloudyCarthagenaCelinaChickasawColdwaterEastview ParkFort RecoveryGrand Lake Saint Marys State ParkGrand Lake St Marys SPBHamrick AirportLakefield AirportMaria SteinMendonMercer Wildlife AreaMontezumaMontezuma BayMulholland AirportRockfordSt HenrySt Johns