Glen-Allan, located in the Mississippi Delta region, experiences a humid subtropical climate with hot summers and mild winters. The area is characterized by low-lying flatlands and an extensive network of rivers and streams, including the Mississippi and Yazoo Rivers. Hydrology constituents in the area include high levels of sediment, nitrogen, and phosphorus due to agricultural runoff. Outdoor recreation opportunities in the area include fishing, hunting, and birdwatching, with popular destinations including the Delta National Forest and Panther Swamp National Wildlife Refuge.