MOUNTAINEERING INFORMATION ARTICLES

Aconcagua - When To Go

The best time of the year to climb Aconcagua is during the austral summer, from December until early March. It is logical that one can expect more snow and higher rivers early in the season, followed by increasingly drier conditions as the season progresses.

Because the Pacific Ocean is just 150 km to the west, the mountain receives all of its bad weather from the moist, humid winds that blow from the west off to the Pacific Ocean. A typical scenario is that these winds are driven upward by the western slope of the Andes, where the air cools, condenses, and forms the lenticular cloud that covers the summit. This phenomenon is also referred to as "Viento Blanc", meaning white wind. It is a sign of snow and high winds at altitude. It is essential to descend with the first sign of this type of weather.

The peak climbing month seems to be February, when the climbing conditions are considered to be the best. However, there is an increasing number of climbers who go the during Christmas, because of the snow and the great view. Also, some parties plan their climbs to coincide with two South American celebrations. In February, one can celebrate the summit achievement by attending the Carnival festivities in Vina del Mar, Rio de Janeiro, Punta del Este, or Mar del Plata. In March, the city of Mendoza hosts the Argentine national wine festival. Hotel reservations during both events should be made long time in advance.

During the winter months of May to August, most of the area is snow covered and is extremely windy. At times, the road to Mendoza can be impassable due to the major snowstorms and their effects on the road. It is therefore impractical to plan a climb to Aconcagua during these months.

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