The horse latitudes are the latitudes about 30 degrees north and south of the Equator. They are characterized by sunny skies, calm winds, and very little precipitation. They are also known as subtropical ridges or highs. It is a high-pressure area at the divergence of trade winds and the westerlies.
The subtropical ridge shows up as a large area of black (dryness) on this water vapor satellite image from September 2000.
The subtropical zones or subtropics are geographical and climate zones to the north and south of the tropics. Geographically part of the temperate zones of both hemispheres, they cover the middle latitudes from 23°26′10.1″ (or 23.43613°) to approximately 35° north and south. The horse latitudes lie within this range.
Homes in subtropical Charleston, South Carolina, along The Battery
Live oak with araucarias in Curitiba, Brazil
Natural fog in Northwest Vietnam
Wetland Park in Hong Kong, China