Torres del Paine National Park has a microclimate regulated principally by its proximity to the sea, and its low altitude (from 50 mt/165 ft - 300 mt/985 ft above sea level), which allows for pleasant temperatures both during the winter and the summer. 

Los Glaciares National Park and the area around El Chaltén are slightly higher (450 mt/1,476 ft), meaning its climate tends to be colder during the winter. Both are transition zones toward the steppe region, and therefore the climate is very dry. During the winter there is some snow, which typically melts quickly. Wind is a very important factor, above all during the summer, with gusts of up to 110 km/70 miles per hour.

This can be a disadvantage but it nevertheless produces a continual change in climactic conditions; for example it can be raining one moment but the wind can shortly disperse the clouds and allow the sun to shine, making the climate an element of emotion.

The most attractive seasons are usually the autumn for the changing foliage colors and the spring for the rebirth of flora and fauna. During the winter there are often days of transparent and radiant sun, and there is sufficient light for a full day of exploration, also making it an attractive season to visit.