The classic season to climb the mountain on foot is during the summer months of June – September. Ski ascents are usually made from late March to May. The most amenable weather is usually during the ‘high summer season’ although the mountain and huts can get very busy in late July and August. Autumn often provides cool but fine stable weather and, with the closure of the huts meaning a greater degree of self reliance, an ascent at this time of year can provide a fine ‘expedition feel’. A tougher ascent but often with good conditions and a quiet mountain. Not many people climb Mont Blanc in winter due to the Arctic like cold, serious weather and deep snow giving very tough trail breaking and an increased avalanche risk.