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.
In fact, less than 20 percent of the earth's total desert area is covered with sand, and sand dunes only account for about two percent of the surface of North American deserts. One of the largest dune systems in the United States is the Algodones Dunes.