The Desert Southwest, including areas like Arizona, Nevada, and New Mexico, is part of the arid climate zone, known for its dry conditions and low rainfall.

The Desert Southwest of the United States is a prominent region that falls under the arid climate zone. This area includes states like Arizona, Nevada, and New Mexico, and is characterized by hot temperatures, especially in summer, with very little rainfall. The region's deserts, such as the Sonoran and Mojave Deserts, support drought-resistant vegetation like cacti and shrubs. The lack of moisture and high temperatures define the arid environment, making it one of the driest parts of the U.S.