Roby is a small town located in Fisher County, Texas, with a population of approximately 600 people. The town experiences a semi-arid climate with hot summers and mild winters. Summers are typically hot, with temperatures ranging from the mid-90s to low 100s Fahrenheit, while winters are mild, with temperatures averaging in the 50s and occasional freezes.

Hydrologically, Roby lies within the Brazos River watershed, with the Salt Fork Brazos River passing near the town. The region's hydrology is characterized by low annual precipitation and limited surface water availability. The groundwater is the primary source for water supply, mainly sourced from the Trinity and Edwards aquifers.

Despite its small size, Roby offers various outdoor recreation opportunities. The nearby Lake Sweetwater is a popular spot for fishing, boating, and water sports enthusiasts. Anglers can catch a variety of fish species, including bass, catfish, and crappie. Hunting is also a popular activity in the area, with opportunities for deer, turkey, and quail hunting. Additionally, the surrounding countryside provides opportunities for hiking, birdwatching, and wildlife photography, offering nature enthusiasts a chance to explore the beautiful landscapes of the region.