I woke to a temperature of -4° Fahrenheit according to the weather app on my twice-as-smarter-than-me-phone. When the weather is cold like this, the app also offers the “feels like” temperature based on windchill. The “feels like” temperature can be dramatically colder than the actual temperature at times. If you consult a windchill temperature chart, a temperature of -4° will feel like -25° with a sustained wind of 15 miles-per-hour.
This morning feels like -4° due to calm conditions.
Just once, I would like to wake to a -4° temperature that feels like 70°.--Mitchell Hegman