When you step outside on a winter day, the thermometer might say 20°C or ~70°F. But, if there’s a wind blowing, it’ll feel a lot colder because of wind chills.
It is fascinating to dig into what happens. Our body generates heat and creates a thin layer of warm air around our skin. On a calm day, that layer stays put.
But when the wind blows, it strips away that warm layer. Our body has to work harder to replace it, resulting in us losing heat faster. That’s what the wind chill measures – how cold it feels based on accelerated heat loss.
It is worth thinking about this for a second – we walk around with this invisible layer of insulation that we don’t even know exists.
Our bodies and this world never cease to amaze me.
A Learning a Day 