Saint Donatus is a small village located in Jackson County, Iowa, with a population of around 140 residents. The village experiences a humid continental climate, characterized by hot summers and cold winters. Average temperatures range from 20°F (-6°C) in winter to 85°F (29°C) in summer. Precipitation is evenly distributed throughout the year, with an average annual rainfall of 36 inches (91 cm) and an average annual snowfall of 31 inches (79 cm).

Saint Donatus is situated near the Maquoketa River, a major hydrological feature in the region. The river provides opportunities for fishing, boating, and kayaking. The area is also known for its natural beauty, with lush forests and scenic landscapes attracting outdoor enthusiasts. Nearby attractions include Maquoketa Caves State Park, where visitors can explore a network of caves and hike through picturesque trails.

Additionally, Saint Donatus hosts an annual festival called "St. Donatus Stone Church Festival" that celebrates the town's rich heritage and offers various outdoor activities, live music, and local cuisine. Overall, Saint Donatus offers a tranquil environment for outdoor recreation, surrounded by the beauty of nature and the charm of a small, welcoming community.