実用

Wind Chill Calculator

単位:

Temperature (°C)

Wind Speed (km/h)

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Detailed Guide Coming Soon

We're working on a comprehensive educational guide for the Wind Chill Calculator in your language. The content below is shown in English.

とは何か Wind Chill Calculator?

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The wind chill index measures the perceived decrease in air temperature felt by the body due to wind. Wind accelerates heat loss from exposed skin, making it feel colder than the actual temperature.

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公式

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f(x)WC (°F) = 35.74 + 0.6215×T − 35.75×(V^0.16) + 0.4275×T×(V^0.16), where T=°F, V=mph

変数の説明

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記号	名前	単位	説明
WC	Wind Chill	°F	—
T	Air temperature	°F	—
V	Wind speed	mph	—

方法 Wind Chill Calculator

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1Wind chill (°C) = 13.12 + 0.6215T − 11.37V^0.16 + 0.3965T×V^0.16
2T = air temperature (°C); V = wind speed (km/h)
3Only meaningful when T < 10°C and V > 4.8 km/h
4Wind speeds above 80 km/h have diminishing additional effect

解いた例

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例 1

入力:Temperature −10°C, wind 40 km/h

結果:Wind chill = 13.12 + 0.6215×(−10) − 11.37×40^0.16 + 0.3965×(−10)×40^0.16 ≈ −20°C

実際の応用

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Winter weather advisory issuance

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Outdoor activity safety (hiking, sports)

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Occupational health (outdoor workers)

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Frostbite risk assessment

Wind Chill Reference Chart (°C)

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Temp	10 km/h	20 km/h	40 km/h	60 km/h
-5	-10	-13	-15	-17
-10	-15	-19	-22	-25
-15	-21	-26	-30	-33
-20	-27	-33	-38	-41

よくある質問

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Is wind chill real or just perceived?

Real: wind accelerates heat loss from exposed skin. Doesn't change actual air temperature, but speeds freezing.

What wind chill is dangerous?

Below −15°F: frostbite possible in 30 min. Below −25°F: frostbite in 10 min. Below −35°F: frostbite in <5 min.

How fast does wind speed need to be for wind chill?

3 mph minimum for meaningful effect. Higher speeds = greater wind chill. Wind chill maxes out around 60 mph.

参考文献

›Wind chill — Environment and Climate Change Canada

Mathematically verified

Reviewed October 2026

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Wind Chill Calculator