Williamstown, Ohio is a charming town located in the northwestern part of the state. The climate in Williamstown is classified as humid continental, characterized by warm summers and cold winters. Average temperatures range from the mid-80s°F (29°C) in the summer to the mid-20s°F (-4°C) in the winter. Precipitation is evenly distributed throughout the year, with slightly higher rainfall in the spring and fall.

The hydrology constituents in Williamstown are mainly influenced by the Great Lakes region. The town is surrounded by several rivers, including the Maumee River, which provides ample opportunities for water-based recreational activities such as fishing, boating, and kayaking. The area is also known for its numerous lakes and reservoirs, offering further options for water enthusiasts.

For outdoor recreation, Williamstown boasts several parks and nature reserves. The nearby Maumee Bay State Park offers a variety of activities like hiking, camping, and swimming. Oak Openings Preserve, known for its diverse ecosystems and rare plant species, is an ideal spot for birdwatching and nature walks. Additionally, Williamstown is in close proximity to the Lake Erie Islands, where visitors can enjoy ferry rides, beaches, and unique island experiences. Overall, Williamstown, Ohio is a picturesque destination that caters to nature lovers and outdoor enthusiasts.