Sloan, Iowa is a small town located in the western part of the state, in Woodbury County. The climate in Sloan is characterized as humid continental, with cold winters and warm summers. Average temperatures range from around 20°F (-6°C) in January to about 85°F (29°C) in July. Precipitation is fairly evenly distributed throughout the year, with an annual average of around 30 inches (76 cm).

The town of Sloan is situated near the Little Sioux River, providing opportunities for outdoor recreation. The river offers possibilities for fishing, canoeing, and kayaking. Additionally, the area has several parks and nature reserves where visitors can enjoy hiking, camping, and picnicking.

In terms of hydrology constituents, Sloan relies on groundwater from wells for its water supply. The water quality is regularly tested to ensure it meets safety standards. The municipality also manages stormwater runoff to prevent flooding and protect water quality in nearby water bodies.

Sloan, Iowa may be a small town, but it offers residents and visitors a chance to enjoy outdoor activities amidst its beautiful natural surroundings.