I went the exact same week last year. First time in February for me (previously had gone in October several times). I loved the weather! We got a good mix. The first few days, warm enough for water park or pool. We switched up our plans and went to Typhoon Lagoon our first day. Then it cooled off a bit and was pleasantly warm (mid-to-upper upper 70s and no humidity!) We only had about two hours of rain the whole week - but when it rained, it poured! Was so glad I had a poncho with me - the rain was going sideways.
I don't like super-hot and humid weather, so the last part of February was really wonderful for me, weather-wise. But I think the whole East Coast is experiencing colder than usual weather for the last several weeks -- so be prepared to have potentially cooler weather than I had last year. It's always a good idea to pack at least a few clothes for cooler temps - it's such a pain (not to mention expensive!) to have to buy stuff after you arrive. I always pack a warm jacket, long pants, a hoody, and even gloves - you never know this time of year!
