My father was there.... he said it was brutally cold.
Other problems as well. It had to be awful, from what he said
Horrendous casualties in the tens of thousands from frostbite and exposure as most of our troops were in summer clothing.
Some “brilliant Genius”, (was it Omar Bradly?) decided the “War Will Be Over By Christmas” and put the men’s winter gear in storage, not shipping it to the front lines as would have been prudent.
In the '60s I played golf with a older man on a brutally hot day. I complained about the oppressive heat along with everyone else, but I noticed that he did not. Curious, I asked him why. He said he was so cold during the Battle of the Bulge that he swore he would never again complain about being too hot.
My father was there, too (First Army, 9th Inf. Div.).
His stories always started with the nasty cold, then his buddies who died, then the vacant stare. Occasionally he would add other details for me. His last night of being able to speak, he told his nurses the whole story. They stayed past shift until I arrived the next morning to ask me if it was true. And then some. He left me his battlefield diary.