Ralston, Iowa is a small town located in Carroll County, in the central part of the state. It experiences a humid continental climate, characterized by warm summers and cold winters. Average temperatures range from around 20°F (-7°C) in winter to 85°F (29°C) in summer. Precipitation is evenly distributed throughout the year, with an average annual rainfall of around 34 inches (86 cm) and snowfall of approximately 30 inches (76 cm).

The town's hydrology is primarily influenced by the nearby Middle Raccoon River. The river provides a source of freshwater and supports various aquatic species. Additionally, the area has several small creeks and wetlands that contribute to the local hydrological system.

Ralston offers a range of outdoor recreation opportunities for nature enthusiasts. The Middle Raccoon River provides excellent conditions for fishing, with species such as catfish, bass, and walleye attracting anglers. The surrounding forests and open fields are ideal for hiking, bird-watching, and wildlife photography. The town also has a municipal park with picnic areas and playgrounds, perfect for family outings and gatherings. Overall, Ralston's climate, hydrology constituents, and outdoor recreation opportunities make it an attractive destination for those seeking to connect with nature.