Silex, Missouri is a small town located in Lincoln County, within the state's eastern region. The climate in Silex is characterized as humid continental, with hot and humid summers and cold winters. Average high temperatures in the summer months range from the 80s to low 90s Fahrenheit, while winter temperatures often drop below freezing.

Hydrologically, Silex is situated near the headwaters of Cuivre River, which flows through the town. The river provides opportunities for fishing and boating, with common fish species including bass, catfish, and crappie. Additionally, several small lakes and ponds are scattered throughout the area, offering further fishing and recreational activities.

Outdoor enthusiasts in Silex can enjoy various recreational opportunities. Cuivre River State Park, located nearby, features over 6,000 acres of woodlands, hills, and valleys, offering hiking, camping, and horseback riding trails. The park also has picnic areas, playgrounds, and opportunities for wildlife viewing. Additionally, Silex is surrounded by picturesque farmlands and rolling hills, providing scenic biking and nature exploration opportunities.