What Defines Semi Arid?

: characterized by light rainfall especially : having from about 10 to 20 inches (25 to 51 centimeters) of annual precipitation.

What is classified as semi-arid?

A semi-arid climate, semi-desert climate, or steppe climate is the climate of a region that receives precipitation below potential evapotranspiration, but not as low as a desert climate. There are different kinds of semi-arid climates, depending on variables such as temperature, and they give rise to different biomes.

What defines if a region is arid or semi-arid?

Arid regions by definition receive little precipitation—less than 10 inches (25 centimeters) of rain per year. Semi-arid regions receive 10 to 20 inches (25 to 50 centimeters) of rain per year.