There are numerous different deserts in the world, so average rainfall per year varies according to these regions. The Brooks Range in Alaska, for example, receives around 250 millimeters, or 9.8 inches of precipitation every year. This particular desert is classified as a cold desert.
Zero rain has to fall. However, if the region consistently receives over 10 inches (250 mm) of precipitation on average per year it is not considered a true desert.
Rain has the ability to fall in the desert because it is picked up by clouds and transferred. Because the desert has very little to no water available rain must fall for the plants and animals.
Average rainfall of less than 30 Millimeters
Osoyoos has semiarid climate and is not classified as a desert. It receives an average of 279.4 mm (11 inches) of rainfall annually.
Precipitation in Antarctica -- on average -- is no more than an inch or two each year..
On average between 100mm (in the north) and 150mm in the South of rain per year.
rain fall
On average, it only has 8 inches of rainfall per year.
there is on average 750mm of rain fall in Aberdeen, Scotland per year
A desert is defined as a region that receives less than 10 inches (250 mm) of rainfall per year on average.
Depending on location, rainfall varies from 0 to 2 mm in January - virtually nothing.
rain fall