Wind Chill – Quick Summary
- Wind makes cold air feel even colder.
- Wind chill occurs below 10 °C and above 5 km/h wind speed.
- Wind removes heat from the body more quickly.
- Wind chill = perceived temperature due to wind + cold.
- You’ll find the tool below the image.
Wind Chill
In windy conditions, it can feel significantly colder than it actually is. This phenomenon is known as wind chill, or feels-like temperature.
The word wind chill comes from the English verb to chill, which means “to cool down.” Wind chill refers to the cooling effect of the wind on the human body.
An initial indication of wind chill occurs when the air temperature is around 5 °C and the wind speed is about 5 km/h. From that point on, the difference between actual and perceived temperature becomes noticeable. Wind chill mainly plays a role in the autumn and winter seasons, especially when the temperature drops below 10 °C and the wind speed exceeds roughly 1.6 m/s (5–6 km/h) — when you can softly feel the wind on your face and leaves start to rustle.
Wind removes heat from the body. The stronger the wind, the faster the body loses heat. For example, a wind speed of 30 km/h at an air temperature of 10 °C results in the same heat loss as 0 °C in still air.
The wind chill index expresses the combined effect of wind and temperature in a single value — the temperature that the body actually experiences. The greater the difference between the air temperature and the wind chill, the more intense the heat loss from the body.
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