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Argentina is subject to a variety of climates. The north of the country, including latitudes in and below the Tropic of Capricorn, has characterized very hot, humid summers (which result in a lot of swamp lands) with mild drier winters, and is subject to periodic droughts during the winter season. Central Argentina has hot summers with tornadoes and thunderstorms (in western Argentina producing some of the world's largest hail), and cool winters. The southern regions have warm summers and cold winters with heavy snowfall, especially in mountainous zones. Higher elevations at all latitudes experience cooler conditions.

Argentina Climate Map

The hottest and coldest temperature extremes recorded in South America have occurred in Argentina. A record high temperature of 47.3oC (117.1oF), was recorded at Campo Gallo, Santiago del Estero Province on October 16, 1936. The lowest temperature recorded was -40oC (-40oF) at Valle de los Patos Superior, San Juan, July 8, 1966.

The Sudestada (literally "southeastern") could be considered similar to the Noreaster, though snowfall is rarely involved (but is not unprecedented). Both are associated with a deep winter low pressure system. The sudestada usually moderates cold temperatures but brings very heavy rains, rough seas, and coastal flooding. It is most common in late autumn and winter along the coasts of central Argentina and in the Rio de la Plata estuary.

The southern regions, particularly the far south, experience extremely long periods of daylight from November to February (up to fifteen hours), and extended nights from May to June. All of Argentina uses UTC-3 time zone. The country does not observe daylight saving time occasionally, the last summertime being started at 0:00 December 30, 2007 and being finished at 0:00 March 16, 2008.