Is the defining characteristics of the desert its high temperature?

Answer 1

The defining factor of a desert is not temperature as there are hot and cold deserts. Lack of precipitation defines a desert. A desert is defined as a region that receives less than 10 inches (250 mm) of precipitation per year on average.

Answer 2

A desert is generally defined as an area that receives less than 10 inches of precipitation each year. Living conditions are harsh and difficult for plant or animal life.