Wind Chill Calculator
Calculate apparent cold from air temperature and wind speed
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.
Wind Chill Calculator FAQ
Common questions about apparent cold, wind speed, formula limits, and winter safety.
What does wind chill mean?
Wind chill estimates how cold air may feel on exposed skin when wind removes body heat faster than calm air.
Why can wind make the temperature feel colder?
Moving air strips away the thin warm layer near the skin. Stronger wind can increase heat loss and make cold weather feel more severe.
When does the NWS wind chill formula apply?
The standard formula is intended for cold air and measurable wind. Outside that range, the calculator flags the result as outside the formula range.
Does wind chill affect objects or only people?
Wind chill describes heat loss from people and animals. It does not cool inanimate objects below the actual air temperature.
Is this wind chill result safety advice?
No. It is an educational estimate. Follow local weather alerts and use appropriate cold-weather protection in freezing or windy conditions.