A desert is a land that receives an average of less than ten inches of rain per year. The climate in the Sahara desert is one of the harshest in the world. The region is subject to winds that are frequently strong and that blow constantly from the northeast. These very often dust-laden winds are felt north and south of the desert. Rainfall is sparse with an average annual total of less than 5 inches.
Temperatures also vary from place to place.
This was in September 1922. Freezing temperatures are however not uncommon at night from December to February. Animals and plants. Many plants have long roots that allow them to reach out and collect water over great distances. Other desert plants have taproots.