Milltown, Wisconsin is a small village located in Polk County. The climate in Milltown is characterized by mild summers and cold winters. Average temperatures range from 20°F (-6°C) in winter to 80°F (27°C) in summer. Precipitation is evenly distributed throughout the year, with an average annual rainfall of 31 inches (79 cm).

Milltown is surrounded by beautiful natural features, including several lakes and rivers. The St. Croix River, which borders the village, provides opportunities for boating, fishing, and kayaking. The nearby Gandy Dancer State Trail is a popular destination for hiking, biking, and snowmobiling. Outdoor enthusiasts can also explore the Kettle Moraine State Forest, located to the east of Milltown, which offers camping, hiking, and wildlife viewing.

The hydrology constituents of Milltown mainly consist of the St. Croix River and its tributaries, along with several smaller lakes in the surrounding area. These water bodies provide ample opportunities for recreational activities such as fishing, swimming, and boating.

Overall, Milltown, Wisconsin offers a pleasant climate, diverse hydrology constituents, and numerous outdoor recreation opportunities, making it an ideal destination for nature lovers and outdoor enthusiasts alike.