Not sure where Mougins is but if in northern France the weather will be pretty much the same as in the southern part of the UK however, if you are south of the Loire the temperature will be higher but it doesn't necessarily mean the rain won't fall. I have just returned from a fortnight in the Dordogne region where the weather was wet and miserable but several degrees warmer than eastern England, oh, and the food was so much better too!! JD