How much rain does a desert get in a year?
By most climatologists’ definition, a desert is an environment receiving less than 25 cm of precipitation per year. By that definition much of the Arctic and Antarctic are deserts! The driest desert in the world is the Atacama desert in northern Chile. There are places there which have never recorded any rainfall, and geologists estimate that some parts of the Atacama have not received any measurable rainfall for over one thousand years!
