Prevailing winds, sea currents and stationary cyclones near ChileChile map of Köppen climate classification.annual average temperatures of Chilemonthly mean temperatures of Chile
The climate of Chile comprises a wide range of weather conditions across a large geographic scale, extending across 38 degrees in latitude, making generalizations difficult. According to the Köppen system, Chile within its borders hosts at least seven major climatic subtypes, ranging from low desert in the north, to alpine tundra and glaciers in the east and southeast, tropical rainforest in Easter Island, Oceanic in the south and Mediterranean climate in central Chile. There are four seasons in most of the country: summer (December to February), autumn (March to May), winter (June to August), and spring (September to November).
On a
Andes Mountains. Despite Chile's narrowness, some interior regions may experience wide temperature oscillations and cities such as Lonquimay, may even experience a continental climate. In the extreme northeast and southeast the border of Chile extends beyond the Andes into the Altiplano and the Patagonian plains, giving these regions climate patterns similar to those seen in Bolivia and Argentina
respectively.
Regions
It [Chile] has four months of winter, no more, and in them, except when there is a quarter moon, when it rains one or two days, all the other days have such a beautiful sunshine...
Pacific Anticyclone are essential to keep the dry climate of Atacama Desert. The average rainfall in the Chilean region of Antofagasta is just 1 mm per year. Some weather stations in the Atacama have never received rain. Evidence suggests that the Atacama may not have had any significant rainfall from 1570 to 1971.[4] It is so arid that mountains that reach as high as 6,885 metres (22,590 feet) are completely free of glaciers and, the southern part from 25°S to 27°S, may have been glacier-free throughout the Quaternary—though permafrost
extends down to an altitude of 4,400 metres and is continuous above 5,600 metres. Studies by a group of British scientists have suggested that some river beds have been dry for 120,000 years.
Some locations in the Atacama do receive a marine fog known locally as the Camanchaca (garúa in Peru), providing sufficient moisture for hypolithic algae, lichens and even some cacti. But in the region that is in the "fog shadow" of the high coastal crest-line, which averages 3,000 m height for about 100 km south of Antofagasta, the soil has been compared to that of Mars.
As the climate map shows, where elevation is high enough to preclude any month with an average temperature of 10°C, precipitation is low enough to allow a transition between a cold desert (Köppen classification BWk) and tundra (ET).
Mediterranean
Mediterranean climate distribution in the Americas. Note that the map of Chile is turned upside down
The climate of
La Frontera corresponds to southern limit of the mediterranean climate, with typical mediterranean fruits such as avocado, citrus, olives and grapes being cultivated north of it and oat, wheat, apples and potatoes to the south. This more or less drastic transition is caused by the split of the westerlies at these latitudes (~37° S) into one branch going to the southeast and another to the northeast, to this it is necessary to add the north-south lowering of the Chilean Coast Range which reduced the rain shadow effect.[5]
Temperate oceanic
Maritime influence makes some southern Andean valleys prone to snowfalls in winter such as in Curarrehue in the picture.
See also:
Climate of Valdivia
In Zona Sur and the northern part of Zona Austral the climate is Temperate oceanic. Here the Andean Cordillera intercepts moist westerly winds along the Pacific coast during winter and summer months; these winds cool as they ascend the mountains, creating heavy rainfall on the mountains' west-facing slopes. The northward-flowing oceanic Humboldt Current creates humid and foggy conditions near the coast. The tree line is at about 2,400 m in the northern part of the ecoregion (35° S), and descends to 1,000 m in the south of the Valdivian region. In the summer average temperature can climb to 16.5 °C (62 °F), while during winter the temperature can drop below 7 °C (45 °F).[6]
Subpolar oceanic
The seasonal temperature in Zona Austral is greatly moderated by its proximity to the ocean and is known for its stable constant temperatures, only small variability with season. The heaviest rainfalls goes between April and May and snow season goes all through Chilean winter (June till September), although the average temperature does not descend below 1 °C in coastal areas. This is the coldest region of South America. Puerto Natales in Zona Austral is the city with most rainy days per year in Chile, averaging 161.[7]
Climate charts for different locations of Chile from north to south
