Every year in mid-May the Patagonian forest explodes in a festival of autumn colors. Lengas, the ñires and other species of Nothofagus turn yellow, orange and red fire on the slopes of the mountains. While in the northern hemisphere spring begins to melt ice and snow, warming the atmosphere and causing the minds begin to dream of summer vacation, down here in the south the days are getting shorter and shorter, makes cooler and we can feel in the air the unmistakable scent of autumn in the forest. And of course, apart from the smell our eyes can see the color of the landscape changes almost overnight.
In the fall, in late April to mid-May, the arrival of autumn produce a veritable explosion of colors in the woods that attracts tourists from around the world, especially amateur photographers and landscape. First are the poplars, present in the Andean foothills steppe or those who acquire an intense yellow color before losing all its leaves, swept by strong winds.
Here are the Lenga (Nothofagus pumilio) and ñires (Nothofagus antarctica), covering the slopes of the mountain range that takes a red coloration producing a real festival of colors in the forest, which are mixed from deep red to the green through the full range of red, brown, ocher and gold imaginable.
This autumnal landscape also has the value of the ephemeral, lasting only a few weeks and literally changing every day. In the San Martin de los Andes in the province of Neuquen, Argentina, the show fall is great, one of the most recommended times to visit the area, if not the best. As seen towards Lake Lácar, the left side the impressive wall of black rock Chapelco, which already appear the first snow is observed, and below it a stunning strip of red vegetation that seems to ascend to the heights.
If we turn our eyes forest stretches as far as the eye can see, with the highest combination of natural colors you can imagine, in contrast to the steppes in the background and clear skies or clouds covered in strange formations.
The right side of the lake, the Curruhuinca hill is completely covered with vegetation and, although still predominantly green, everyday reds and yellows are opening step, sometimes coexisting in the same tree and making the landscape change from a overnight measurably.
Patagonia is a multifaceted territory, different and changing landscapes. This is especially true in the ecoregion known as Andean-Patagonian Forest, also called sub-Antarctic forest and extends on the slopes of the Andes from north to south along a stretch of about 50 km. Wide from the province of Neuquén to Tierra del Fuego, at the southern tip of the continent. The landscape of this region suffers (or rather enjoy) a major transformation as the evolution of the seasons and cycles of flowering and falling leaves of different tree species in the forest.

Weather in Patagonia Argentina

The main features of the Patagonian climate are short fall and spring, and long winters. High temperature range between summer and winter, and is also marked temperature difference between day and night.
The average winter temperature is -2 ° C and maximum summer can reach 40 ° C in the Upper Black River Valley and Neuquén. In Tierra del Fuego the thermometer reaches 30 degrees.

The Andean Patagonia is humid, rainfall exceeds 2000 mm per year and to the east is increasingly dry to the Atlantic area, where the average annual rainfall is only 200mm.
In Tierra del Fuego, the rain gauge recorded about 800mm annually.
In order to travel safely and enjoy the Patagonian landscape, the best time is in summer, between the months of December and March, although this excludes, of course, the snow lovers.

Weather for areas:

North Atlantic zone: In this zone western winds predominate and, on the coast there are frequent sea storms. The air is very dry, rainfall reached 250 mm. Annual and no snow. Therefore, the overall look is aridity. The seawater temperature is pleasant, since the coasts are bathed by the southern end of the warm current from Brazil.

South Atlantic Zone: In general, this climate falls under the category “arid plateau”. Rains range from 200 to 300 mm. Year, no snow. They are almost constant winds from the west and south. The seawater temperature is cold.

Tierra del fuego: The sea and mountains help to moderate the climate. In the area of Rio Grande westerly winds blow at an average of 25 km / h and maximum of up to 200 km / h, but with few lulls. In Ushuaia the southwestern wind predominates, with averages of 15 km / h and maximum 100 km / h, and with longer periods of calm. Near the Beagle Channel cloudy sky it is common.

Glaciers: It is an area of foothills and mountains. There is a strip of transition between the plateau and the forest, where rains are becoming increasingly abundant. There are also abundant snowy precipitation. The mountains moderate winds.

The Nordpatagonian: The climate ranges from very humid in the mountains (in this region are the areas with highest annual rainfall in the country) to damp at the start of the plateau. Rainfall grow to the west, there is abundant snow in winter.

High Río Negro and Neuquén: Rains range from 200 to 400 mm. per year, no snow. Prevailing winds are from the west. topographical differences must be taken into account, as the weather is more moderate near the rivers and arid and cold as one approaches the plateau.

South Río Negro: It’s a cold and very arid climate, with less than 200 mm; annual rainfall (in some places, much less) what transforms it into one of the most arid regions of the country. The winds blow almost constantly, with predominance of the west and south.

Weather for provinces:

Río Negro
In most of the province’s arid climate and cool temperate, called “Climate Barren mesothermal” (Thornwhite), indicating that, except in the irrigable area of Mallin Ahogado, the water shortage is severe throughout dominates all year, while the mountain area (southwestern part), can be characterized as “Wet” to “Subhúmedo”.
The average annual evapotranspiration ranges from 791 mm (High Valley) to 922 mm (Choele Choel) and 863 mm (Lower Valley), while the water deficit for the same locations 562, 598, 445 mm, respectively .-
Temperatures: The average annual temperature ranges between 10 and 12 ° C. The annual temperature range is considerable: the average temperatures reach 23 ° C, while the minimum averages for July and August, down to 3 ° C. The variability of this factor becomes more noticeable when considering the extreme values: -26 (July) and 34ºC (January).
Typically, this temperature range is associated with the occurrence of late spring frosts, extremely harmful to fruit growing: the frost-free period ranges between 165 and 200 days / year.-
Neuquén
The climate is continental and arid Neuquén. The rainfall is very low and no seasonality. Temperatures are characterized by an important swing both daily and annual, with warm summers, with an average of 24 ° C in January and cold winters, averaging 6 ° C in July, with night frosts.
Chubut
The weather is cold and humid in the west or Andean region, dropping temperatures to the south, the center of the province is predominantly arid and thermal amplitude with an area of oasis given by the lakes Colhué Huapi and Musters, there is the city of Sarmiento, which have registered some of the lowest in the Argentina Continental temperatures during the twentieth century: in July 1950 34C below zero, while further east, in the lower valley of the Chubut river and in the coast the weather stays dry while still quite benefited by moisture from the Argentine Sea and ocean thermal action moderating influence.
Santa Cruz
In general, the climate of the region is arid with low temperatures almost all year round and strong thermal amplitudes and insufficient rains, determining the biome of semi-desert, where hard grass steppe and Tusacs such as Neneo, Coirón and Choique Mamuel predominate. While the area of the basin of the Santa Cruz River in its extraandina region is favored by a moderated climate thanks to strong oceanic influence, this is the region of the Pampas of Diana calls to the buttresses and Andean pedemontes is also important humidity, to the extent of favoring the existence of forests, corresponding to the cold forest Magellanic of Fagaceae and conifers (ena, cohiue, Nire, cinnamon, Maniu, the latter fir, allochthonous), but due to the altitude, wet strip cordillerana with an annual average rainfall of 800 mm, it is cold almost all year.
Another typical feature of the climate of most of the province of Santa Cruz is the almost constant winds blow in from the Pacific Ocean.
Tierra del Fuego
The climate in this region is quite inhospitable. Is subpolar oceanic (Koppen climate classification Cfc) with short, cool summers and long wet and mild winters: the northeast is characterized by strong winds and little precipitation; in the south and west is very windy, foggy and humid most of the year and few days a year without rain, sleet, hail or snow. In Staten Island, 230 km east of Ushuaia receives 1400 mm of rain. Rainfall is strongest in the West, 3000 mm annually.
Temperatures are quite uniform throughout the year: in Ushuaia just over 9 ° C in summer and average 1 ° C in winter. Snowfall can occur in summer. The cold and wet summers help preserve the ancient glaciers. The southernmost islands possess subantarctic climate typical of tundra that makes the growth of trees impossible. There are some areas inside that are polar climate. Regions in the world with similar climates to Tierra del Fuego are: Aleutian Islands, Iceland, Alaska Peninsula and Faroe Islands. Winters are very long and rigorous which are continuous snowfall during winters, when temperatures are constantly placed under the -10 ° C (10 degrees Fahrenheit or Celsius) hours of sun are rare (dawns made the 9.30 and darkens to 15.00), spring usually have frequent showers and occasional snowfall, summers are nice but with temperatures barely above 15 ° C (exceptionally, from global warming, there have been a few days with temperatures frizaron 30 ° C), if in winter sunshine hours are few, by contrast, during the summer fueguino the sun rises early and just it gets to 2230. Throughout the year are frequent and strong winds (howling or roaring) blowing from the southwest quadrant bringing cold air and high humidity that condenses and precipitates in the mountains.