Duncan, Mississippi is located in the Mississippi Delta region and has a humid subtropical climate with hot summers and mild winters. The area is influenced by the Mississippi River and its tributaries, leading to a high water table and frequent flooding. Hydrology constituents in the area include sediment, nutrients, and pesticides from agricultural runoff. Outdoor recreation opportunities in Duncan include hunting and fishing in nearby national wildlife refuges and state parks. The Tallahatchie and Coldwater Rivers also offer opportunities for kayaking and canoeing.