The normal summer temperature is 38° Celsius and the normal winter temperature is -2° Celsius. Deserts receive very little rainfall and most water evaporates quickly. The Sahara desert is the largest and hottest desert in the world. Deserts have a variety of plants like cacti, yuccas and trees that have adapted to the dry conditions. Animals living in deserts include horned lizards, kangaroo rats, roadrunners and meerkats that have developed ways to survive the heat and lack of water.