This is my first winter here, so I am very curious how my trees will respond. So far, though we have had 20 or more mornings of frost, it is very light. We have only had one or two nights that got down below 20 F... and that was only for an hour or two. We have not had a single day that did not get above freezing. So my Japanese maples did not at first drop leaves. The native maples around here were not turning color until mid-November, and Acer rubrum was not coloring up until December.
So we have been getting a lot of cold in the "sweet spot" of just below freezing to just above. But I'm not joking when I say Tuesday it is supposed to get up to 70 F here (21 C).