Wind Chill Calculator
Calculate apparent cold from air temperature and wind speed
Imperial mode uses degrees Fahrenheit and miles per hour.
°F
mph
Cold note: Wind chill estimates exposed-skin cooling. Use local forecasts, clothing, shelter, and winter weather advisories for real outdoor decisions.
Wind Chill
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Wind Speed
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Feels Colder By
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Exposure Band
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Formula Status
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Calculation Steps
How Wind Chill Is Calculated
The calculator follows the NWS wind chill equation and its defined input range.
Wind effect
Wind removes heat from exposed skin faster, so cold air can feel much colder than the thermometer reading.
Formula range
The NWS wind chill equation is defined for temperatures at or below 50°F and wind speeds above 3 mph.
Outdoor planning
Use wind chill as one signal alongside precipitation, sun, clothing, exposure time, and local warnings.
Wind Chill Examples
Compare how wind changes the apparent cold.
NWS example
0°F with 15 mph wind feels like about -19°F
Metric winter day
-10°C with 24 km/h wind feels like about -19°C
Calm air
When wind is 3 mph or lower, the NWS wind chill equation is not defined.