Mercer County Weather ForecastUnited StatesOHMercer County5869CelinaRain Showers5969Fort RecoveryRain Showers5769RockfordRain Showers5869ColdwaterRain ShowersCarthagenaCelinaChickasawColdwaterEastview ParkFort RecoveryGrand Lake Saint Marys State ParkGrand Lake St Marys SPBHamrick AirportLakefield AirportMaria SteinMendonMercer Wildlife AreaMontezumaMontezuma BayMulholland AirportRockfordSt HenrySt Johns