I saw an interesting article in one of the bow mags a month or two back about this. The authors were saying that they shot their best bucks in the rain, also they saw just as much movementif not more during the rain.
I started paying attention to widelife after or during rain that week i read that article. I saw turkeys anda doe in areas I usually do not. I also notice during the rain or after the rabbits and groundhogs and squirell are always moving in my backyard..