Harrisonville, Missouri has a humid continental climate with hot summers and cold winters. The area receives an average of 41 inches of rainfall annually and experiences occasional flooding due to its proximity to the South Grand River. The hydrology constituents of the area include the South Grand River and several smaller creeks and streams. Outdoor recreation opportunities in Harrisonville include access to Lake Harrisonville for fishing and boating, Harrisonville City Park for picnicking and hiking, and the Katy Trail for biking and hiking. The area also has several golf courses and is near the James A. Reed Memorial Wildlife Area for hunting and wildlife watching.