Hamersville, Ohio is a small town located in Brown County, in the southwestern part of the state. The climate in Hamersville is classified as humid continental, with four distinct seasons. Summers are warm and humid, while winters are cold and snowy. The town's water supply comes from the nearby White Oak Creek, which flows into the Ohio River. As such, water quality can be affected by factors such as agricultural runoff and industrial pollution. Outdoor recreation opportunities in the area include hiking and fishing at nearby East Fork State Park, as well as birdwatching and wildlife viewing along the Ohio River.