climate

Inside the north is the Atacama desert, with little rain. Despite its proximity to the Pacific Ocean, two main factors determine its barrenness: 1) the influence of the South Pacific anticyclone that blocks the passage of frontal systems and 2) the barrier effect of the Andes, which prevents arrival of moist air masses from the continental tropical sector.

In the Altiplano, strong solar radiation and nocturnal emission of infrared radiation from the surface explain the strong thermal contrast between day and night. Thus, most nights (even in summer) may freeze and it can be hot at noon. The variation in temperature can be 30 ° C in the same day,   -5 ° C at night and 25 ° C at noon.

The presence of Lake Titicaca determines a variation in humidity and temperature of the area: more humid in the north and west than in the south and east.

Photo: Wikipedia.com "