I went to Disney World in October and wore a playsuit. It was perfect! No uncomfortable shirts riding up on rides and it kept my legs covered (because who wants butt burn?) They're super cute and comfortable. They look like this (though the one in the middle is weird). If you hate that idea, I'd just go with shorts and a tank. I think you'll get too hot in jeans or leggings.

<div id='prev-mm' class='mm-img'><a href='https://s.yimg.com/hd/answers/i/0f85c02e2425405db9ef2d2b54c46ef6_A.jpeg?a=answers&mr=0&x=1407139916&s=189f2eea710b33389b1986b96a543128' rel='nofollow'> <img width='392' height='221' src='https://s.yimg.com/hd/answers/i/0f85c02e2425405db9ef2d2b54c46ef6_A.jpeg?a=answers&mr=0&x=1407139916&s=189f2eea710b33389b1986b96a543128'/></a>

Wear shorts definitely. It's going to be very hot. Although the Los Angeles area can be rather cool right on the ocean (even in summer), you don't have to go very far inland to get a major jump in temperatures. Given the crowds, the relative shelter of the area from wind and all the walking around in the sun you'll be doing, you will want to dress for summer.

I'd wear a tight tank top and short jeans shorts with some converse shoes

shorts and a tank!

Shorts that a reach to your knees or if you get on the rides in short shorts you will blister your legs and come into skin to skin contact with every nasty asss that has sat there in short shorts before you. you can wear the tank top and will be nice and cool. Have fun!

Im going the 20th!! (yayayayy) And what im wearing the first day is a one peice. Its combined shorts and tangtop. Its pink & gray striped. So ill be pretty cool. If I were you, im thinking you'd want comfy, cool, and pretty. So wear shorts(not too tight) And a nice loose tangtop. Nice cool colors, like pastels, pink, white..NO BLACK. Black attracts heat.

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what do you think of this outfit, obviously you won't have the exact same clothes but you could wear something similar, then just throw on a sweater if you get cold :) <a href="https://www.youtube.com/watch?v=8bB2H8tPduQ" rel="nofollow">https://www.youtube.com/watch?v=8bB2H8tP...</a>