I don't know where you plan to travel but you will probably have freezing weather most of the time until you get to southern Arizona. I winter in Salome, about 100 miles west of Phoenix. It froze at least a dozen times hard enough that the water hoses and some park water lines were froze in the morning. It even froze and snowed in Phoenix last winter during January.
I typically leave Wisconsin during the third week of October. I sometimes run into snow along I40 in the Albuquerque thru Flagstaff areas even then. I definitely did last October. In the south, they do have some snow plows but I have never seen a salt truck so you either lay over until it melts or you just have to drive thru snow and slush.
If you take what I call the southern route (I30, I20, and I10), then you run the chance of heavy ice storms.
LeRoy
