Circleville, Ohio has a humid continental climate with hot summers and cold winters. The town is situated in Pickaway County and is home to the Scioto River, which provides hydrology constituents for the area. Outdoor enthusiasts can enjoy a variety of activities such as fishing, kayaking, and hiking along the river. The Pickaway County Park District also offers several parks and nature preserves for visitors to explore, including the A.W. Marion State Park and Deer Creek State Park. In addition to outdoor recreation, Circleville is known for its annual Pumpkin Show, a week-long festival celebrating the town's pumpkin-growing heritage.