Mercer County Weather ForecastUnited StatesOHMercer County1822CelinaChance Flurries1822Fort RecoveryChance Flurries1822RockfordChance Snow1822ColdwaterChance FlurriesCarthagenaCelinaChickasawColdwaterEastview ParkFort RecoveryGrand Lake Saint Marys State ParkGrand Lake St Marys SPBHamrick AirportLakefield AirportMaria SteinMendonMercer Wildlife AreaMontezumaMontezuma BayMulholland AirportRockfordSt HenrySt Johns