I went in February for two weeks a few years ago and the weather was great (t shorts and shorts weather) and the parks were pretty quiet.
There is Presidents day sometime in February and the parks were buys that weekend (like one of our bank holiday weekends) but the rest of the time it was great.
I would not even consider going in Juiy as someone said. Hot, humid, crowded, a living hell.
Discussion here on Trip Advisor about going in February
http://www.tripadviso...-Orlando_Florida.html