First Colorado blizzard in forecast tonight...
- Chicken George
Over in Utah here, yep storm headed way! I would not fret about the temp you noted. Birds will do fine if dry and out of the wind/draft. Perhaps as you get toward the teens or lower you may want to keep a good eye on them, and from that do what you think best. If your roost is wide enough to cover their feet… they will snuggle down and be fine. For me and my birds, I don't worry about them until it gets below 0 degrees.
Just make sure they are feed well, have water at all times, coop is dry and no drafts, you will be fine.
I didn't turn on any supplemental light; I even had 4 that decided to roost in a tree that night
They were frosty feathered but fine; they'll snuggle. Ventilation is really important here, because they'll snuggle and breathe hot moist air on each other and can get frostbite, so as long as there's air flow (but not a strong draft) they'll be just fine
Edited by shortgrass - 11/16/15 at 9:35pm