Crestline, Ohio has a humid continental climate characterized by four distinct seasons. Summers are warm and humid, while winters are cold and snowy. The area is located in the Sandusky River watershed and surrounded by farmland. Hydrology constituents include agricultural runoff, which can contribute to nutrient pollution in nearby bodies of water. Outdoor recreation opportunities include hiking and camping in the nearby Mohican State Park, fishing and boating in the nearby Clear Fork Reservoir, and golfing at the Valley View Golf Course. The area's natural surroundings and recreational opportunities make it an ideal location for outdoor enthusiasts.