Mercer County Weather ForecastUnited StatesOHMercer County4161CelinaDecreasing Clouds4061Fort RecoveryDecreasing Clouds4160RockfordPartly Sunny4061ColdwaterPartly SunnyCarthagenaCelinaChickasawColdwaterEastview ParkFort RecoveryGrand Lake Saint Marys State ParkGrand Lake St Marys SPBHamrick AirportLakefield AirportMaria SteinMendonMercer Wildlife AreaMontezumaMontezuma BayMulholland AirportRockfordSt HenrySt Johns