Saudi Arabia lies between latitudes 16°N and 33°N—entirely within the subtropical desert belt, not the torrid zone (tropics: 23.5°S–23.5°N).
Thus, most of Saudi Arabia is north of the Tropic of Cancer, placing it in the subtropical hot desert climate (BWh)—extreme summer heat, mild winters, minimal rain. The torrid zone (tropics) is closer to the equator; Saudi Arabia is poleward of it.