Diagonal is a small town located in southern Iowa with a humid continental climate characterized by hot summers and cold winters. The town is situated near the East Fork of the Grand River and has a relatively flat topography. The hydrology constituents of the area are dominated by agricultural land use, resulting in higher levels of nutrients and sediment in waterways. Outdoor recreation opportunities in Diagonal include hunting, fishing, and boating in the nearby lakes and rivers. The town is also home to several parks and trails for hiking and biking, as well as a golf course. Overall, Diagonal offers a peaceful retreat for outdoor enthusiasts seeking to enjoy the natural beauty of Iowa.