Prairie-Lea, Texas is a small, unincorporated community located in Caldwell County. Situated in the southern part of the state, Prairie-Lea experiences a subtropical climate characterized by hot summers and mild winters. Summers are typically hot and humid, with temperatures often exceeding 90°F (32°C), while winters are generally mild with temperatures ranging between 40°F to 60°F (4°C to 15°C).

Hydrologically, Prairie-Lea lies within the Colorado River basin. The region is dotted with creeks and small tributaries, contributing to the local hydrology. The area receives an average annual rainfall of about 38 inches, with most precipitation occurring during the spring and fall months.

Outdoor recreation enthusiasts will find several opportunities in and around Prairie-Lea. The nearby Plum Creek Wildlife Management Area offers hunting and fishing activities, allowing visitors to engage in birdwatching, deer hunting, and fishing for bass and catfish. The Lockhart State Park, just a short drive away, provides opportunities for camping, hiking, and golfing. Additionally, the picturesque countryside surrounding Prairie-Lea is perfect for scenic drives, picnicking, and nature photography.