We are on the Great Lakes in N-Pa and we also get the –20-30 evenings. I wont say I go out to the tub during them but around zero is fair game. Our tub sets 2 steps from the door to the house and by the time I could get a robe out I’m in the house drying off.
I just mounted a row of coat hooks along the privacy fence we have and towels / robes get hung on them.