Hi there....my kids and I have gone several times in May/June and also in August. You can definitely expect hot and humid. And while the forecast may call for scattered storms etc. it is not always an indication that it will rain all day. There are times that it won't rain at all even when the forecast predicts it and times when a storm will roll in and really pour but for a short time (an hour maybe) and then the sun is back out. Like the others said, you really can't predict anything except hot and humid. If you have ponchos, bring them each day. When everyone else runs to hide from the rain, pop on your ponchos and enjoy some shorter wait times in lines. The rain can sometimes be welcome...it does break up the humidity a bit sometimes. Just don't let the prospect of daily chance of rain ruin your trip! We're planning to be there next week and there are lightning bolts on my weather app for almost every day of our stay but the Harry Potter ponchos are all packed and we're not worried! You'll have a blast.