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In 2003, the Champagne vineyard, affected by a late spring frost and a summer heat-wave which were also observed across Europe, suffered significant damage. The temperature conditions of 2003 could be frequent in future and wine growers wish anticipate this. Daily minima and maxima results from the ARPEGE-Climate model make it possible to estimate frequencies of cold springs and warm summers for the period 2001 to 2100, with three scenarios currently used in climate change impact studies. In the context of climate change frost damage could be more significant in March in case of early budding and exceptional summer heat-waves could increase scorching of the fruit.