According to weather.gov, the lowest low at my location in Midwest USA was -12F in 1917-12-30. It does occasionally get down to 0F, but my herd has little problem with that. I break ice and make sure they have hay.

One time, I had a little bull born overnight in a February cold snap. Due to an unfortunate interaction between its mother and a brush pile, it wandered into a ditch and couldn't nurse until I found it in the morning. I brought them both in the (unheated) barn and reminded it how to nurse. After a day in the barn I turned them back out. That bull still had a red nose when I sold it as a 2yo to a neighbor, so we called it "Rudolph".

Of course I'm in Missouri, not North Dakota, so one probably couldn't bring my heat-acclimated Red Angus crossed with Akaushi and Charolais to North Dakota and expect them to thrive. There are plenty of Red Angus herds in North Dakota, however. North of there, I guess they have to raise Scottish Highlanders?