I am planning on 10 days in Chamonix from July 15-25. But 10 day forecast is showing highs in mid 60's and 8 days of rain or scattered showers. Only 2 days are partly cloudy. Is this a bad weather window or is that as good as it gets those mountains? If I won't get many climbing days I can probably re-route my itinerary for greener pastures.

baumann, you have some info here: http://fr.wikipedia.org/wiki/Chamonix-Mont-Blanc