Mercer County Weather ForecastUnited StatesOHMercer County5786CelinaMostly Sunny5785Fort RecoveryMostly Sunny5685RockfordMostly Sunny5786ColdwaterMostly SunnyCarthagenaCelinaChickasawColdwaterEastview ParkFort RecoveryGrand Lake Saint Marys State ParkGrand Lake St Marys SPBHamrick AirportLakefield AirportMaria SteinMendonMercer Wildlife AreaMontezumaMontezuma BayMulholland AirportRockfordSt HenrySt Johns