We went in the middle of August and it was hot!!! Make use of the water parks or pools at the resort. We did not stay on the property b/c my husband was on a business trip and we only had 2 days to spend in Disney. This go round we are staying on the grounds for convience. Also, drink lots of water and wear sunscreen. You will have a blast. All I can say is PLAN, PLAN and plan, even if you get there and the plan goes out the window and you just go with the flow, at least you will have a plan. I will make index cards of each park with what date we are going there and what are MUST see's at that park along with exactly which resturants we will eat at. Make ADR's ahead of time. Have fun and enjoy the magic.