Well it is not a normal day in Lake Buena Vista, Florida if it does not downpour mid afternoon for a solid twenty to forty minutes and then stop. Here is a photo from the skies in Epcot right before it poured and I got stuck in the France pavilion for a while. I perfectly enjoyed being in the France pavilion though as I colored a Duffy to get stamped at each country.
Florida weather is abnormal and it is necessary to bring a poncho everyday to the parks even if the forecast does not say it will rain. If you don’t mind rain and it is the middle of summer, then feel free to be daring and leave the resort without a poncho. You may regret it though. As a sign on Splash Mountain says, “You May Get Wet.”