Hot as heck. Mid august is also rather busier than late august, so crowds will be better towards the end of your trip. And HOT. H-O-T HOT! Consider the spray fans they sell in the parks. If you sweat easily (like I and my dad do) you may want to reconsider, or get yourself some way to cool yourself down. Lightweight, light-coloured clothing. No shorts too short, though, because all the walking and even a tiny bit of water r sweat will cause major discomfort. Oh, did I mention August is HHOOTT!!! ? - C-Ticket  37.2 #87 6:36AM

Yes, very hot and very humid with a heavy down pour of rain almost every day in the afternoon. - PixieDust76  74.1 #60 7:23AM

Ditto on the shorts thing!!! That happened to me this trip in September. Was not fun at all! And ditto for reconsidering. I would personally wait til end September early October and that way your little man can do MNSSHP! Not to mention the weather is much more forgiving and nice=)*+.*+.*+. - CinderellaPrincess85  170.2 #31 7:25AM

Went in August of 2001, never again. Hot, humid, miserable. - DizneyGirl  383.3 #10 8:28AM