We live in Southwest VA where it does get cold in the winter but can also be really mild. The days lately, for example, have been in the mid 60's with nights falling into the 40's. We originally planned our chicken tractor to be able to be moved from the coop to various spots in the yard in the morning and back at night. But, as often happens, reality didn't match up with intentions, and moving it across the yard repeatedly is a HUGE pain! The tractor has a nice little nest box on it, and the gals will huddle in there together at night. At what temperatures though do I need to worry about making sure they can get inside the coop to stay warm? We have a Buff Orpington, a Dark Brahma, two Partridge Cochins, and two Ameracaunas.
We haven't gotten above 22 degrees (F) in over a month now night time lows have been between -4 and +15 and yet still have a half dozen chickens who choose to sleep outside. We make sure they have access to food and liquid water and so far they are happy. I'd say as long as your chickens have been climatized to the temps you have nothing to worry about.
I agree, once again...lol, with AK, they will be fine. If you want to read a little article on this, check out my blog HERE . Good luck!
