The week of conference (including the week-end before the conference) should be mostly cloudy. Perturbations coming from the West will push one after the other, all week-long. As a result clouds and sun will keep alternating. It might be a litlle windy and it may rain, but hopefully not all the time. Maximun temperatures will be between 17-22 C, and decreasing along the week.
You may check today's weather, a four-day broadcast, or here for more pointers. You can also listen to the phone broacast (in French) by calling 08 3668 0101, calling from france.
Have you already seen Eyes Wide Shut uncut ?