I'm in Texas City, Texas (google it..can't really go much further south of Houston).
I'm probably about 60 miles "more south" than you, but.. the big thing is I'm sitting right on the gulf itself, which is a huge weather modifier.
The north side of Houston gets regular freezes each year, as well as the occasional snow, where as I've seen entire winters here (where i live) were it never got below freezing.
I think it has frozen twice so far.




















