Decatur is a small town located in central Mississippi with a humid subtropical climate. The summers are hot and humid, while the winters are mild with occasional snowfall. The town is situated near the Chunky River, which is a tributary of the Pascagoula River. The hydrology constituents in the area include sediment, nutrients, and pesticides, which can impact the water quality of the rivers and streams. Outdoor recreation opportunities in Decatur include fishing, kayaking, and hiking in nearby parks such as the Bienville National Forest and the Okatibbee Wildlife Management Area. The town also hosts the annual Chunky River Raft Race, a popular event for locals and visitors alike.