Mercer County Weather ForecastUnited StatesOHMercer County1630CelinaMostly Cloudy1630Fort RecoveryMostly Cloudy1629RockfordMostly Cloudy1630ColdwaterMostly CloudyCarthagenaCelinaChickasawColdwaterEastview ParkFort RecoveryGrand Lake Saint Marys State ParkGrand Lake St Marys SPBHamrick AirportLakefield AirportMaria SteinMendonMercer Wildlife AreaMontezumaMontezuma BayMulholland AirportRockfordSt HenrySt Johns