New Carlisle, Ohio, is a small town situated in Clark County. The climate in New Carlisle is typical of the Midwest region, with hot summers and cold winters. The area experiences an average annual temperature of around 52°F and receives approximately 41 inches of rainfall per year.

The hydrology of New Carlisle is primarily influenced by the Mad River, which flows through the town. The river provides a habitat for various aquatic species and is a popular spot for fishing and boating enthusiasts. Additionally, there are several small ponds and lakes in and around the town that offer recreational opportunities for water activities.

Outdoor recreation in New Carlisle includes options for hiking, biking, and camping, with several parks and nature reserves located nearby. The Smith Park and the New Carlisle Sports & Recreation Complex host various sports activities, while the Buck Creek State Park offers opportunities for camping, fishing, and boating. The town's natural surroundings provide ample opportunities for residents and visitors to enjoy the great outdoors.