When talking about the weather these days, our vocabulary is limited: snow, sleet, freezing rain, cold, wind chill. More often than not there’s a minus sign before the temperature. It’s that minus sign, usually signifying wind chill, that’s really tough to take.
Wind chill is commonly described as how cold it feels — due to air flow on our bodies — as opposed to how cold the thermometer says it is. The National Weather Service offers a helpful windchill chart, color-coded so you can see how quickly you will get frostbite. If the temperature is 15 degrees, you need only a 20 mph wind to bring you down to minus 2. The chart goes all the way to -98 (-45 with a 60 mph wind) but really, no one wants to go there.