Officially, the climbing season is between November 15th and March 31st of every year.
Our suggestion is to climb Mount Aconcagua between late November and late February.
This is mainly because of two factors, first because of weather conditions. It is within this period when weather is warmer in the Austral Hemisphere and climate more stable on Aconcagua.
Secondly, because it is when there is availability of all necessary logistics to go ahead with the climbs (mules, base camps supplies, porters, etc).
Before and after, the lack of visitors might make highly probably that you find no logistics. Regarding weather, large snowfields, strong winds and major snowstorms are a possibility.
Low season: from November 15 to November 30 and from February 21 to March 31
Mid Season: from December 1 to December 14 and from February 1 to February 20
High Season: from December 15 to January 31
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