The first time we went in early November, the weather was gorgeous. Not a spot of rain, and very comfortable temperatures in the mid-80s.
The same week a few years later, there was no rain, but we had two miserably hot days--95 and 98 degrees, with uncomfortably high humidity. We were so hot and sweaty we looked like we had been hosed down. We only made it till noon at Universal Studios both days, and went back to our air-conditioned room at POFQ and napped till late afternoon. The other days were much more tolerable.
The cast members we talked to said that such hot, humid days were unusual for that time of year, that usually it's quite nice then.