We went once the first week of Feb. and on another trip the last week of January. The Feb. trip it was low 80's all week and cooler at night, but not that bad. The late January trip (in 2003) the Southeast was going through VERY cold temps (we knew before we left). In fact..it was colder in FL then it was in No. VA! But it wasn't that bad. We wore sweatshirts or a coat and were still able to ride the rides w/o our faces freezing in position. DD still swam (but was cold getting out). Then after 3 days of that it was in the low 70s. I don't think it gets too intolerable, but you may not be able to wear shorts alot. Late Jan/early Feb. is our absolute favorite time to go (no crowds, no high heat and humidity, and everyone is in REALLY good moods because there aren't any crowds!), but we have kids in school and can't always go, but once in awhile.