We've been there for tropical downpours, as well as for Hurricane Charlie..that was fun. We've been there during the summer, when we prayed for a tropical downpour!!
If you go to central Florida, from May thru Oct, you have to be prepared for rain..and sometimes days of it. Not the most fun you can have but it is to be expected.
We had one summer WDW trip that was incredible. We had a 1pm trail ride. The sky looked threatening but we were told that they were in constant contact with the weather people...if there were to be 'bad weather' they would be told. Well...we were about 20 mins into the hour long ride when the skies opened!! I have never been that wet, with all my clothes on!!! It was as if I had jumped into a pool!!! My underwear was even soaked. But, they refunded our money when we returned.
The next day??? It was beautiful when we left the Polynesian for MK. It was about 2pm. By the time we got to MK, via the monorail, the sky was almost black. The monorail was held at the platform. We all stood around, waiting for the storm to pass. I have yet to see a storm quite like that one!! The monorail wasn't allowed to leave!! The lights started coming on by 2:45!!! And yes, we were still standing, under cover, on the platform. By 3, we said enough is enough!! And ran for MK. We were pretty soaked by the time we got to Main St. But, the park was virtually empty!!! We did buy ponchos..since we stupidly left our .99 ones back in the room!!! We had a great night. It rained until about 9pm...then the rain let up and it just showered!!! We still talk about that day/night!!!
It's WDW, it's central Florida, it's June/July/August. It's going to hot/steamy and/or rainy. If it doesn't rain, you die. YOu start praying for rain!!! One August when we were there, Orlando was having a heat wave!!! Believe me, rain is not the worst thing that can happen, weather-wise. You do NOT want to be in central Florida, in August, when there is a heat wave. Worse than torrential rain.
If it rains, get a poncho, and head out. You should have packed a pair of wet weather shoes. We tend to bring
Crocs with us just for that reason. Yes, they can get slippery when it's wet, but if you're careful, it's fine. Or, just plan accordingly and buy some water sandals. I have some that I wear all the time in Florida in the summer months. They're comfy and they are fine if wet.
Wear shorts, and short-sleeved shirts. That way only your skin is getting wet. Head for the indoor stuff...attractions, movies, shops.