Union-Church is a small town located in southwestern Mississippi, United States. The town experiences a humid subtropical climate, characterized by hot and humid summers and mild winters. Summers bring average high temperatures in the 90s°F (30s°C), while winters see average highs in the 50s°F (10s°C). Precipitation is evenly distributed throughout the year, with an annual average of around 55 inches (140 cm), and occasional severe weather events such as thunderstorms and tornadoes.

Union-Church lies in the Mississippi River Basin, and its hydrology constituents are influenced by this proximity. The town is surrounded by numerous creeks and small rivers, providing opportunities for fishing and boating. The nearby Homochitto National Forest offers beautiful hiking trails, camping areas, and picnic spots. Nature enthusiasts can explore the diverse flora and fauna of the region, including various bird species and deer. The town also hosts the annual Homochitto River Festival, which celebrates the local culture and heritage and offers live music, food vendors, and family-friendly activities. With its pleasant climate and scenic outdoor opportunities, Union-Church attracts visitors seeking to immerse themselves in nature's beauty.