Montalba, Texas is a small unincorporated community located in Anderson County. The area experiences a humid subtropical climate, characterized by hot summers and mild winters. Summers are typically hot and humid, with average temperatures ranging from the mid-90s°F (35°C) to the low 70s°F (21°C), while winters are mild with average temperatures ranging from the mid-60s°F (18°C) to the mid-40s°F (7°C). Montalba receives an average annual rainfall of around 44 inches, with precipitation fairly distributed throughout the year.

Hydrologically, Montalba is home to several creeks and small tributaries that contribute to the larger Neches River system. These water bodies provide opportunities for fishing and canoeing, with species such as bass, catfish, and crappie being common.

Outdoor enthusiasts can enjoy various recreational activities in Montalba, including hiking, camping, and wildlife watching. The area offers scenic trails that wind through forests, providing opportunities to observe the diverse flora and fauna. With its pleasant climate and picturesque surroundings, Montalba offers ample opportunities for outdoor enthusiasts to explore and enjoy nature.