Take if from someone who grew up in South Florida. We raised three boys in Disney (well not in Disney just passholders for many many years) and there is nothing more miserable than standing in line in 95 degree weather with 150% humidity and 5 million people crowding around and everyone complaining because of the heat. You'll be ready to leave the park before 12 noon I guarentee it.... Disney is magical, but not under certain conditions and I think July, Aug, Sept. are the exceptions.
DON'T CHANGE YOUR DATES if you do you'll be
DON'T CHANGE YOUR DATES if you do you'll be