Jamestown, Ohio is a small village located in Greene County. The climate in Jamestown is considered humid continental, characterized by warm summers and cold winters. Average summer temperatures range from the mid-70s to low 80s Fahrenheit, while winter temperatures can drop to the mid-20s. Precipitation is evenly distributed throughout the year, with an average annual rainfall of around 40 inches and occasional snowfall in the winter months.

The hydrology constituents of Jamestown are primarily influenced by the nearby Caesar Creek State Park. The park encompasses a large reservoir, Caesar Creek Lake, which provides opportunities for fishing, boating, and swimming. The lake is also a popular spot for birdwatching and wildlife observation.

In addition to the state park, Jamestown offers various outdoor recreation opportunities. The nearby Jamestown Wildlife Area provides hunting and trapping activities, while the Little Miami Scenic Trail offers hiking, biking, and horseback riding along a former railway line. With its diverse range of outdoor activities and natural beauty, Jamestown is a great destination for nature enthusiasts and those seeking outdoor adventures.