Nariño has a diverse geography and varied climate according to altitude: hot in the plains of the Pacific and cold in the mountains, where most of the population resides, a situation that is repeated in a north-south direction.
Nariño presenta unha xeografía diversa e clima variado segundo as altitudes: caloroso na chaira do Pacífico e frío na parte montañosa, onde vive a maior parte da poboación, situación que se repite en sentido norte-sur.