Disney in Orlando is amazing! the summer is a popular time to go there so i would dodge June July and august. winter is slower and only a little crowded. may is most commonly starting to get crowded...
It is usually between the 80s and 90s during the day and 70s and 80s at night. Rain is common, so it's a good idea to bring a poncho or umbrella so that you don't have to buy one or get soaked. Also...
It depends on the ride for example most of the roller coasters have really long lines, but some don't have anyone. It all depends on which ride or service and when you go to the park.