Hillsboro, Illinois is a charming small town located in Montgomery County, in the central part of the state. The town experiences a humid continental climate, characterized by hot and humid summers and cold winters. Summers are typically warm, with temperatures averaging in the high 80s to low 90s Fahrenheit, while winters are cold, with temperatures dropping to the 20s and occasional snowfall.

Hydrologically, Hillsboro is situated near the headwaters of the Shoal Creek watershed, which provides a source of water for the area. The creek is a popular spot for fishing and canoeing, with a variety of fish species including bass, catfish, and carp.

Outdoor enthusiasts will find plenty of recreation opportunities in and around Hillsboro. Montgomery County offers several parks and nature preserves, providing opportunities for hiking, bird watching, and picnicking. The Coffeen Lake State Fish and Wildlife Area, located just northeast of Hillsboro, is a major attraction for anglers and boaters, with its large reservoir offering excellent fishing and water sports. Additionally, nearby Sangchris Lake State Park offers camping, hiking, and hunting opportunities.

Overall, Hillsboro, Illinois offers a pleasant climate, accessible hydrological resources, and a range of outdoor recreation activities for residents and visitors to enjoy.