Mercer County Weather ForecastUnited StatesOHMercer County3658CelinaRain Likely3659Fort RecoveryRain Likely3558RockfordRain Likely3658ColdwaterChance Rain ShowersCarthagenaCelinaChickasawColdwaterEastview ParkFort RecoveryGrand Lake Saint Marys State ParkGrand Lake St Marys SPBHamrick AirportLakefield AirportMaria SteinMendonMercer Wildlife AreaMontezumaMontezuma BayMulholland AirportRockfordSt HenrySt Johns