Mercer County Weather ForecastUnited StatesOHMercer County5872CelinaRain Showers5874Fort RecoveryRain Showers5871RockfordRain Showers5873ColdwaterRain ShowersCarthagenaCelinaChickasawColdwaterEastview ParkFort RecoveryGrand Lake Saint Marys State ParkGrand Lake St Marys SPBHamrick AirportLakefield AirportMaria SteinMendonMercer Wildlife AreaMontezumaMontezuma BayMulholland AirportRockfordSt HenrySt Johns