rhagfo,
Far from a deep freeze this coming week here in the Midwest where we live. We're in Michigan on the shore of Lake Michigan west of Grand Rapids and the lowest temp even at night forecasted will be 29F and in the mid 30's to low 40's daytime thru next Sunday. That's as far as the forecast goes.
No need to even winterize yet. Lake Michigan's vast waters are still way to warm to have way below freezing air temps on this side of the lake and will be for another more than a month. Geee, I love Lake Michigan and it's stored summer heated water and the natural A/C blowing on us during the summer as the lake will be colder than the air! We've lived here over 72 years now and know just what to expect and when. It's just like clockwork and never disappoints.
It will be colder in the U.P. and in upper Wisconsin, Minnesota, and to the west of course with accumulations of snow on the ground where they don't have the Great Lakes influences on the weather that passes over them.