Saint-Charles, Iowa is a charming town located in Madison County. It experiences a humid continental climate, characterized by hot and humid summers, cold winters, and moderate precipitation throughout the year. Summers in Saint-Charles are pleasant, with average temperatures ranging from 70°F to 85°F, while winters can be chilly, with average temperatures ranging from 15°F to 35°F.

The town is surrounded by beautiful natural landscapes, including the Middle River, which flows nearby. The hydrology of Saint-Charles is influenced by the Middle River, providing opportunities for various water activities like fishing, boating, and kayaking. The river also contributes to the town's scenic beauty and offers a tranquil environment for outdoor enthusiasts.

In addition to water-based activities, Saint-Charles is known for its extensive network of hiking and biking trails. These trails wind through picturesque countryside, offering breathtaking views of rolling hills, meadows, and woodlands. Outdoor enthusiasts can enjoy activities such as hiking, mountain biking, birdwatching, and picnicking along these trails.

Overall, Saint-Charles, Iowa offers a diverse range of outdoor recreational opportunities, allowing visitors and residents to immerse themselves in the natural beauty of the area while enjoying various activities throughout the year.