Santa Rosa is a small town located in Cameron County, Texas. The climate in Santa Rosa is classified as a humid subtropical climate, characterized by hot summers and mild winters. Summers are typically hot and humid, with temperatures reaching the high 90s°F (32-37°C), while winters are mild, with temperatures ranging from the 50s°F (10-15°C) during the day to the 30s°F (0-5°C) at night.

The hydrology of Santa Rosa is mainly influenced by the nearby Rio Grande River. The river serves as a vital water source for the region, supporting agriculture and providing recreational opportunities. The Rio Grande is known for its diverse fish species, making it popular among anglers.

In terms of outdoor recreation, Santa Rosa offers various opportunities for nature enthusiasts. The town is home to several parks, such as Santa Rosa State Park, which provides camping, hiking, and bird-watching opportunities. The nearby Laguna Atascosa National Wildlife Refuge offers additional outdoor activities, including wildlife viewing, hiking, and hunting. The beautiful landscapes and abundant wildlife in Santa Rosa provide a serene and picturesque environment for outdoor enthusiasts to explore and enjoy.