Yeah, most of the character meet spots are outside so they won't come out in the rain. The roaming characters that come to Main St, Nick and Judy, Mary Poppins, etc will stay dry and out of sight. Since we don't get a lot of rain, most outdoor attractions aren't covered and it if rains enough they will start to flood and will close (tea cups, Luigi, Mater, etc). Obviously indoor rides will be fine unless there start to be power issues, which has happened a few times.