We’ve done Late Nov (07), Sept. (09), early Jan (05) and I can tell you hands down trade the possibility of needing a light jacket for the humidity.
If you want to swim the pools are heated. As far as the weather, there is just no guarantee. In Jan, it was 80 for a high and 60 for a low and sunny every single day we were there. But just before we got there it was pouring rain and colder.
Our Nov trip was similar but the Sept. was brutally hot. We are going back again at the same time this year and now know what to expect, but if I had the choice, I would surely move it to early Dec.