Mound City, Missouri is a small town located in Holt County. It experiences a humid continental climate, characterized by hot summers and cold winters. Average temperatures range from highs of around 90°F (32°C) in the summer to lows of around 20°F (-6°C) in the winter. Precipitation is evenly distributed throughout the year, with an average of 40 inches annually.

The city is situated near the banks of the Missouri River, providing hydrological significance. The river's flow influences the town's water supply and contributes to the local ecosystem. Additionally, Mound City is home to Big Lake State Park, located just three miles west of the town. This 407-acre park offers outdoor enthusiasts various recreational opportunities. Visitors can enjoy fishing, boating, and birdwatching on Big Lake, which is known for its abundance of waterfowl. The park also has picnic areas, hiking trails, and camping facilities, providing a tranquil escape into nature.

Overall, Mound City, Missouri offers a pleasant climate, hydrological importance from its proximity to the Missouri River, and outdoor recreation opportunities at Big Lake State Park.