Robertsville is a small town located in Franklin County, Missouri. The climate in Robertsville is characterized by hot and humid summers, with average temperatures ranging from the mid-70s to mid-90s Fahrenheit. Winters are generally mild, with temperatures averaging between the low 20s to mid-40s Fahrenheit. Precipitation is evenly distributed throughout the year, with an average annual rainfall of around 40 inches.

Hydrologically, Robertsville is situated near the Meramec River, which offers various recreational opportunities. The river is popular for fishing, canoeing, and kayaking, with a diverse range of fish species including bass, catfish, and sunfish. Additionally, the Meramec River State Park is located nearby, providing opportunities for hiking, camping, and picnicking.

Outdoor recreation enthusiasts in Robertsville can also explore the surrounding Mark Twain National Forest. The forest offers numerous trails for hiking, mountain biking, and horseback riding, as well as opportunities for hunting and wildlife viewing. The area is known for its diverse flora and fauna, providing a scenic and immersive outdoor experience.