Mercer County Weather ForecastUnited StatesOHMercer County2871CelinaRain2871Fort RecoveryRain Likely2870RockfordChance Rain Showers2871ColdwaterRain ShowersCarthagenaCelinaChickasawColdwaterEastview ParkFort RecoveryGrand Lake Saint Marys State ParkGrand Lake St Marys SPBHamrick AirportLakefield AirportMaria SteinMendonMercer Wildlife AreaMontezumaMontezuma BayMulholland AirportRockfordSt HenrySt Johns