Calculate how cold it actually feels outside using temperature and wind speed.
Wind Chill Temperature describes how cold the air actually feels on exposed skin when wind is factored in. This calculator uses the official U.S. National Weather Service wind chill formula.
T is air temperature in °F and V is wind speed in mph. This formula is valid for temperatures at or below 50°F and wind speeds of 3 mph or higher.
At 20°F with a 15 mph wind: WC = 35.74 + 0.6215×20 − 35.75×15^0.16 + 0.4275×20×15^0.16 ≈ 6.0°F, meaning it feels roughly 14 degrees colder than the actual air temperature.
The "feels like" temperature accounting for how wind increases heat loss from skin.
Combining air temperature and wind speed using an empirically derived equation.
It strips away the warmer insulating air layer near your skin.