Hanlontown is a small town in northern Iowa, situated in a region with a humid continental climate. This area experiences hot summers and cold winters, with precipitation occurring throughout the year. There are several hydrological features surrounding the town, including Clear Lake, which provides opportunities for swimming, boating, and fishing. There are also numerous parks and forests in the area, such as Pilot Knob State Park, that offer hiking trails and camping facilities. In terms of hydrology constituents, the town is located near a number of rivers and streams, including the Winnebago River, which has been subject to water quality issues in recent years.