Dewar, Iowa is a small rural town located in Black Hawk County. The climate in the area is classified as humid continental, with cold winters and warm summers. The town is situated near several bodies of water, including the Cedar River and Wolf Creek, which provide hydrology constituents. Outdoor recreation opportunities in the area include fishing, hunting, and hiking in nearby parks such as Cedar Valley Nature Trail and Big Woods Lake Recreation Area. Dewar is also home to a community park that features a playground and baseball field.