Parts of the Atacama Desert have gone decades, maybe centuries, without measurable rain

Trapped in a double rain shadow between the Andes and Chile's Coastal Range, the Atacama's hyperarid core averages only a few millimetres of rain a year, and some weather stations there have never recorded any at all. It's widely considered the driest non-polar desert on Earth, drier than the deep interior of the Sahara.

— Standard geographic and climatological accounts, Atacama Desert — Hyperarid core rainfall record