Here in North Florida, it is "normal" to have hot weather well into November (as "normal" as weather ever is here-- this is one of those, "If you don't like the weather, wait ten minutes..." places). Two to four weeks of genuinely cold (sometimes freezing) weather is usual at some point between Jan and Feb.
We've just been through a relatively cool low-80s September-October, and look like we're heading for a cold November. The temps are normally in the low 90s this time of year. My central heating has already kicked in a couple of nights lately.
Yup... global warming! You can tell because the weather is unseasonably cool. It's that "Lake effect" stuff from the Great Lakes-- oh, wait-- that would be up in the North, not down here... I think of it in a minute!