[58][59][60][61] Spring is similar to autumn, with a mean precipitation of 340 mm (13 in). [158], Argentina regularly receives cold air from the south that can reach low latitudes owing to the influence of the Andes. Soon the snow stopped and we made a break by the creek to refill our canteens and eat something properly, admiring again the orange-turning-to-red color of the lenga bushes. In Argentina, the climate is divided into four, well defined seasons, those being winter, spring, summer and autumn. [57]:38 Autumn is one of the rainiest seasons, with many places receiving over 350 mm (14 in). [42] A positive phase is when the westerly wind belt is displaced to the south. [147][148] Dust storms are more frequent during droughts, particularly in agricultural areas. Many regions have different, often contrasting, microclimates. [16] The Malvinas Current cools the coastal areas,[17][18] particularly during winter when the current is more stronger. [133] This is because these plains, which cover 35% of the land area in the country (including the Chaco and Pampean areas), are characterized by a flat landscape, which can impede proper water drainage. [30] The passage of the cold front to the northeast leads to the movement of the high pressure system from the South Pacific Ocean into the southern tip of South America. The highest are in the extreme northern part of the Littoral region and northwestern parts of Patagonia, where mean winter precipitation exceeds 250 mm (10 in). [10]:8 Here, the Andes exert an important influence on the climate. [126] This was recorded under standard conditions. [27][29][28] The formation a cold front associated with it moves to the northeast owing to the topographic barrier that the Andes forms. [92] Throughout the region, the diurnal range is great, with very high temperatures during the day followed by cold nights. [142] Several years of droughts during the last decade have severely affected agricultural production and reduced economic growth. [104], Summers in the Pampas are hot and humid with coastal areas being modified by the cold Malvinas Current. This tree species can only be found in some limited areas of Argentina and Chile. [37] In general, El Niño tends to increase precipitation during late spring and summer, particularly in the north. Now the time for the native flora has arrived, and we can enjoy for a few weeks the amazing and fleeting spectacle of the autumn colors on our Patagonian national parks. [127], Argentina's geomorphic characteristics make the country highly vulnerable to floods. [38]:8 The impacts of La Niña in the eastern parts of the country (northeast and the Pampas) are observed in winter where precipitation is lower. [41] In the central–western parts of Patagonia, spring precipitation tends to be lower during La Niña events and higher during El Niño events. [138] Flooding can jeopardize access to safe water. [139], Droughts are the most harmful natural disasters that are difficult to monitor, identify, analyse, and to manage. This thread is pure awesomeness! [126] Since 1961 when nationwide temperature monitoring began, the warmest year on record is 2017 when mean temperatures nationally were 0.68 °C (1 °F) above the mean national temperatures based on the 1981–2010 reference period. In general, northern parts of the country are characterized by hot, humid, rainy summers and mild winters with periodic droughts. [27][29][30] Owing to the topographic barrier of the Andes, it forces and channels the cold air to accumulate on the eastern side of the Andes. [137]:38 Flooding can also affect Patagonia and urban centers in the northwest, but the number of people affected and economic losses are lower than those in the Pampas owing to lower population densities. [19] As well, it is the main factor in making Tierra del Fuego colder than at comparable latitudes in the northern hemisphere in Europe since it is influenced by the cold Malvinas Current rather than the warm North Atlantic Current. In the north, mean temperatures range from 24 °C (75 °F) in March to 18 °C (64 °F) in May. [52] From north to south, these regions are Northwest, Chaco, Northeast, Cuyo/Monte, Pampas, and Patagonia. [99][100][101] The weather in the Pampas is variable due to the contrasting air masses and frontal storms that impact the region. [11] Similarly, in Buenos Aires Province, flooding occurs due to river overflows and poor water drainage; major flooding events in the province occurred in 1987, 2002/2003, 2012 and in 2014, causing damage to agriculture production. [57]:38 As in summer, precipitation falls mainly during convective thunderstorms. [55] As a result, the vegetation differs: eastern areas are covered by forests, savannas, marshes and subtropical wet forest, and western areas are dominated by medium and low forests of mesophytic and xerophytic trees and a dense understory of shrubs and grasses. [146] Many cattle died of hunger, and huge swaths of soy, corn and wheat fields were affected. Sat 28 Nov Argentina v New Zealand (8.45am, McDonald Jones Stadium, Tri-Nations) Live on Sky Sports. [14] There are three major factors that influence the climate of the region: the Andes, the South Pacific High and South Atlantic High, and an isolation that is more pronounced in eastern than western areas. When I was [13] Summer precipitation exhibits an opposite pattern where La Niña years involve wetter summers while El Niño years featuring drier summers. It’s because the weather in this part of the world truly is one. Temperature in southern parts is about 14 °C (57 °F) and in the north there are comfortable 22 °C (71 °F). [13][14][116] Thunderstorms are infrequent, occurring only during summer. there towards the end of the autumn, and also the end of the tourist season, I sometimes experienced summer, autumn and winter all within one day. [39]:12 Thus, invasions of cold air from the south are more common during La Niña events. [11][13][14] Most of the moisture is dropped on the Chilean side, causing abundant precipitation and cloudiness while on the Argentine side, the air warms adiabatically, causing it to become drier as it descends.