Mercer County Weather ForecastUnited StatesOHMercer County4360CelinaIncreasing Clouds4361Fort RecoveryMostly Sunny4360RockfordMostly Sunny4360ColdwaterMostly SunnyCarthagenaCelinaChickasawColdwaterEastview ParkFort RecoveryGrand Lake Saint Marys State ParkGrand Lake St Marys SPBHamrick AirportLakefield AirportMaria SteinMendonMercer Wildlife AreaMontezumaMontezuma BayMulholland AirportRockfordSt HenrySt Johns