How cold is it at the summit of Mont Blanc?

COLD INTENSIFICATION In the Mont Blanc massif, temperature decreases from 0.33 to 0.91°C every 100 m in elevation. The feeling of cold is highly intensified by the wind: it is the « Windchill » effect. At the summit of Mont Blanc, a temperature of -15°C without wind corresponds to -30°C with a 60 km/h wind.



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