Lat year I had 4 golden Comets. We got snow early in Dec. Gladys, the bravest and my little best buddy came right out into it. One other brave one came the next day and one more the third day (snow was more trampled by then). I finally had to go get the 4th. We have only a 4x8 coop and the run is only 6x8. But I let them out to free range each day. The big barn is only a 50' dash from the coop, and once in there, they have a lot more space to roam, while being indoors.
After that initial snow, temps plummeted. Gladys died suddenly. I don't know if it was the cold, but I suspected it. She was fine in the AM and died shortly after I got home from work. A friend said I should have left them in the coop. I don't know if that would have saved Gladys or not. I still miss her a year later.
We'll see how this years batch of chickens handle the snow. We are supposed to get an inch on Wed. Just enough for an introduction.