Mercer County Weather ForecastUnited StatesOHMercer County1964CelinaRain Showers1964Fort RecoveryRain Showers1965RockfordRain Showers1964ColdwaterRain ShowersCarthagenaCelinaChickasawColdwaterEastview ParkFort RecoveryGrand Lake Saint Marys State ParkGrand Lake St Marys SPBHamrick AirportLakefield AirportMaria SteinMendonMercer Wildlife AreaMontezumaMontezuma BayMulholland AirportRockfordSt HenrySt Johns