Mercer County Weather ForecastUnited StatesOHMercer County5871CelinaRain Showers5871Fort RecoveryRain Showers5670RockfordRain Showers5871ColdwaterRain ShowersCarthagenaCelinaChickasawColdwaterEastview ParkFort RecoveryGrand Lake Saint Marys State ParkGrand Lake St Marys SPBHamrick AirportLakefield AirportMaria SteinMendonMercer Wildlife AreaMontezumaMontezuma BayMulholland AirportRockfordSt HenrySt Johns