Lilbourn is a small town located in New Madrid County, Missouri. The climate in Lilbourn is classified as humid subtropical, characterized by hot and humid summers, and mild to cool winters. Average temperatures range from highs of around 90°F (32°C) in the summer to lows of 25°F (-4°C) in the winter. Precipitation is evenly distributed throughout the year, with the wettest months being May to July.

The hydrology constituents in Lilbourn include the nearby Mississippi River and the Little River Drainage District. The Mississippi River plays a vital role in the region's economy and transportation system, providing opportunities for boating, fishing, and water sports. The Little River Drainage District, on the other hand, is a system of ditches, canals, and pumps designed to manage floodwaters and improve agricultural drainage.

Outdoor recreation opportunities in Lilbourn and its surrounding area include fishing, hunting, camping, and hiking. The Mississippi River and its backwaters offer excellent fishing opportunities for bass, catfish, and crappie. The area also has numerous wildlife management areas and conservation areas, providing ample hunting opportunities for deer, turkey, and waterfowl. Additionally, Lilbourn is situated near several state parks and wildlife refuges, offering scenic trails, bird watching, and camping facilities.