sentences:  The Yellow River flows through northern, central, and western portions of Marshall County, past Plymouth; the Tippecanoe River flows through the southeastern part of the county.In recent years, average temperatures in Plymouth have ranged from a low of in January to a high of in July, although a record low of was recorded in January 1985 and a record high of was recorded in July 1936.Average monthly precipitation ranged from in February to in June.