Mercer County Weather ForecastUnited StatesOHMercer County7187CelinaRain Showers7187Fort RecoveryRain Showers7087RockfordRain Showers7187ColdwaterRain ShowersCarthagenaCelinaChickasawColdwaterEastview ParkFort RecoveryGrand Lake Saint Marys State ParkGrand Lake St Marys SPBHamrick AirportLakefield AirportMaria SteinMendonMercer Wildlife AreaMontezumaMontezuma BayMulholland AirportRockfordSt HenrySt Johns