Lohn, Texas is a small unincorporated community located in McCulloch County. It experiences a humid subtropical climate, characterized by hot summers and mild winters. Average high temperatures range from the mid-90s°F (35°C) in summer to the mid-60s°F (18°C) in winter, while lows range from the mid-70s°F (24°C) in summer to the mid-30s°F (2°C) in winter. Lohn receives about 27 inches (69 cm) of rainfall annually, with May being the wettest month.

The hydrology constituents in Lohn primarily include the Colorado River and its tributaries. The Colorado River serves as a crucial water source for the region and supports various outdoor activities. Fishing enthusiasts can enjoy angling for species like bass, catfish, and sunfish in the river. Additionally, the river provides opportunities for boating, paddling, and swimming.

Outdoor recreation opportunities in Lohn extend beyond water activities. The surrounding area offers vast opportunities for hiking, camping, and wildlife viewing. Nature lovers can explore the nearby Brady Creek Wildlife Management Area, known for its diverse flora and fauna. With its pleasant climate and accessible natural beauty, Lohn, Texas provides an inviting environment for outdoor enthusiasts.