Our last trip was towards the end of May, and we really enjoyed ourselves. The crowds were really low, comparable to our previous January trip, so lines stayed pretty short. The weather was great -- no chill in the air like January, no disgusting heat and humidity like the summer, and basically no rain (one shower lasted about 10 minutes and that was it for a week). Plus, Epcot has the Flower & Garden festival, which is really beautiful, and MGM has Star Wars weekends. Definitely a good time to go!!