The Southwest United States is characterized by an arid desert climate, with dry conditions and high temperatures.

This climate is characterized by scorching summers and minimal annual precipitation. It is found in places like Arizona, New Mexico, Nevada, and portions of California. The Sonoran and Mojave deserts, two desert regions in the Southwest, are extremely hot during the day and cool at night. The area's vegetation and water supplies are limited as a result of the lack of rainfall. Much of the Southwest experiences this arid desert climate, which adds to the region's distinct ecology and arid, sun-drenched landscape.