Rio Grande Valley's subtropical climate envelops McAllen, where 143,000 residents endure summer temperatures consistently above 98°F and mild winters averaging 60°F. Flat coastal plain terrain extends in all directions across former brushland, with minimal elevation changes. Proximity to Mexico—just 10 miles south—and the Gulf Coast creates year-round humidity and consistent warmth. Palm trees and citrus groves characterize the landscape, while irrigation from the Rio Grande supports agricultural areas surrounding urban development.
