Barnum, Iowa is a small town located in the north-central part of the state. The climate in Barnum is characterized by warm summers and cold winters with an average temperature of 48°F. The town lies in the Des Moines River watershed, and the river is the main source of hydrology constituents for the area. The water quality in the river is closely monitored by various local organizations. Outdoor enthusiasts can enjoy activities such as fishing, hunting, and hiking in the nearby parks and nature reserves. The town also hosts an annual festival, Barnum Fun Days, which attracts visitors from surrounding areas.