Cotulla is a city in La Salle County, Texas, that experiences a hot and humid climate. The area receives an average annual rainfall of 25 inches, and the Nueces River and its tributaries flow through the region. The city's hydrology constituents include groundwater, surface water, and soil moisture. Cotulla offers several outdoor recreational opportunities, such as birdwatching at the Brush Country Museum's bird viewing station, hiking and biking at the Brushy Creek Trail, and fishing at the Choke Canyon State Park. Visitors can also enjoy hunting, camping, and boating at the nearby wildlife management areas and reservoirs.