Mercer County Weather ForecastUnited StatesOHMercer County5888CelinaRain Showers5888Fort RecoveryRain Showers5788RockfordRain Showers5888ColdwaterRain ShowersCarthagenaCelinaChickasawColdwaterEastview ParkFort RecoveryGrand Lake Saint Marys State ParkGrand Lake St Marys SPBHamrick AirportLakefield AirportMaria SteinMendonMercer Wildlife AreaMontezumaMontezuma BayMulholland AirportRockfordSt HenrySt Johns