That is not cold. I worked construction in Colorado one yr that was down to -40F at times. When it warmed up to 0 F it felt warm. Course I was younger then and we were dressed for it.
The constant strong winds (no snow, just wind) was the killer though.
I assure you it was cold.
And no, I was not dressed for it.
I worked on a 20 story tall outdoor sub bituminous coal fired boiler in the high desert of Arizona. It was at 5,000 feet and cold as the North Pole in the winter of ‘75-‘76. Imagine the winds howling 200 feet above the high desert with absolutely nothing to block or break them. Now THAT was cold.