Wind chill just tells you the rate at which your skin will reach the air temperature. If it were 35 degrees outside with a wind chill of 25, you might think you’re in danger of getting frostbite .

If wind chill can tell me only what I’ve already experienced—my cell phone hand too numb to dial a number, my moustache freezing on my face—then we should just get rid of it altogether.

The modern wind-chill index, which has been revised but is based on this initial principal, is actually focused on someone's risk of developing frostbite, not on how the temperature feels outside ...