Wind chill

Windchill-calculator
If you've ever stood outside on a cold windy day, you know that the wind can make you feel much colder than the air temperature might indicate. The reason is that the wind blows away the thin layer of warm air that normally surrounds your body. Clothing acts as insulation to help trap this warm air, which is heated by your skin. However, a strong wind can still draw heat away from your body unless you are wearing high-quality, wind-proof outwear. The stronger the wind and the lower the temperature, the more rapidly you lose body heat.

What is Wind Chill?Wind chill is the meteorological index that combines the effects of wind speed and temperature. The wind makes you feel colder for two reasons. First, it blows away a thin layer of warm air that normally surrounds your body. Second, it draws away heat by quickly evaporating any moisture that forms on your skin. That's why you feel chilled when you step out of the shower. The stronger the wind, the greater the evaporation and the colder you feel.

Remember, wind chill is just one of the many factors that can affect winter comfort. Others include the type of clothes worn, level of physical exertion, amount of sunshine, humidity level, age and health.

Equivalent temperature is a temperature index which tells you how cold the temperature of the air feels because of the wind (Wind chill factor and equivalent are not normally calculated if the wind speed if below 8km/h. Remember that to convert m/s into km/h you must multiply with 3.6 (eg. 12m/s * 3,6 = 43 km/h))