American here, I agree, our anachronistic measurement systems and twisted pride in them is insane (but insanity is perfectly normal here).

In the lower Midwest it is currently -22C (-8F) in Kansas City and Chicago. In the upper Midwest it's about -25C (--13F) in Fargo, North Dakota and 27C (-17F) in Billings, Montana.

Temperatures are usually 10-15 degrees C higher this time of year, so this weather is quite dangerous.

Edit: I'm only citing air temperatures above. We use the term "windchill" in place of what most countries call "perceived temperature" which tries to estimate what it feels like outside by factoring in wind and humidity conditions. The windchill in those cities would be much lower than the air temperatures. When it gets this cold though, numbers are pretty abstract. It would be more useful to say like the number of minutes exposed skin has until frostbite sets in.

An estimated 95 million people were under weather warnings or advisories for wind chills -0F (-17 C), according to the weather service. Forecasters said the severe cold could push as far south as northern Texas.

It's a month too early.