Duncanville, Alabama is a small town located in the central part of the state. The climate in Duncanville is humid subtropical, with hot summers and mild winters. The area receives an average of 54 inches of rainfall per year. The hydrology in Duncanville is primarily made up of the Cahaba River, which is a major water source for the surrounding communities. This river is also a popular spot for outdoor recreation, including fishing, kayaking, and canoeing. The area is also home to several parks and trails, including the Cahaba River National Wildlife Refuge and Tannehill State Park, which offer hiking, camping, and other outdoor activities.