We have visited orlando in April, May, June and August. I hated it in the summer as we spent a lot of time looking glamourous in yellow capes, canaries springs to mind
April was the best month, no rain, bliss
Less crowds in April and got on everything with a 5 min or less queue.
May abit busier because of the holidays, but great weather and was in the 80s.
Never again in June and August hated it, long queues for hours even with the fast pass, humidity high, and as i said rained all the time, i hate spending all that money, then it rains.
My friends go in October after the hurricane season, nice on the same lines as April and May.
We have stayed at The wynfield inn/Travelodge near seaworld - NOT recommended, and also the Sheraton World hotel which was lovely and had great views of seaworld, and a great hop on, hop off trolley to all the sights.
Good luck.
Michelle x