Day Length: 10h 15m 37s See sunrise, sunset, solar noon, day length, and twilight information for the whole month in the table below.
1 The Chihuahuan Desert â the largest desert in North America, located in the Southwestern United States and Northern Mexico - (140,000 square miles (360,000 km 2)). 2  The Sonoran Desert â a desert located in the Southwestern United States and Northwest Mexico. 3  It is the second largest desert in North America.
The largest areas on Earth that fit this definition are the polar regions. Antarctica has a surface area of about 14 million square kilometers (5.5 million square miles), making it the largest desert in the world. But we are looking for sand dune type deserts and sand covers only about 20 percent of World's deserts.