It is safer to wander around a desert at night.

Aside from peaceful mobs, it appears that the hostile mob generation during night is more frequent, causing large groups of hostile mobs to form instead of a sparse collection as seen in forest biomes. The only way another peaceful mob will be in a desert biome is through a spawn egg, wandering or following a player. No peaceful mobs spawn in desert biomes (other than rabbits). It is very rare for a desert to generate next to a biome with a totally different climate for example, a desert biome and an Ice Spikes biome next to each other. Most desert biomes have jungles near them. However, after the Minecraft 1.6, desert pools of water were removed (the lava pools stayed), allowing only rivers to pass through. Although it is commonly believed that deserts do not have water or very little, small ponds appear quite frequently in deserts. Desert biomes are a good source for Sugar Cane. Like forest biomes, desert biomes have scattered mountains and cliffs, but desert biomes generate with basins more frequently.

Another rare structure found in the desert biome is a desert well, which currently serves no purpose other than an infinite water supply. The few features found here are: Cacti, rabbits, dead bushes, Desert Temples, and the occasional Village. The desert is a bare, almost inhospitable environment. However, hostile mobs will spawn at night, as in other biomes. In the daytime, desert biomes are almost completely devoid of passive mobs ( Rabbits excluded).

Minecraft pocket edition desert skin