Wind chill · NWS formula
Wind chill · NWS formula: use air temperature, wind speed. Review the formula, worked example and calculation steps.
Inputs
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Formula & explanation
WC = 35.74 + 0.6215T − 35.75V^0.16 + 0.4275TV^0.16
Variables & units
- Air temperature
- °F · minimum -100, maximum 50
- Wind speed
- mph · minimum 3.000001, maximum 200
Worked example
0°F with a 15 mph wind gives wind chill approximately −19°F.
Assumptions
Defined for air temperature at or below 50°F and wind above 3 mph. Assumes shade; not the temperature of inanimate objects.
References
Formula version 1.0.0. JavaScript floating-point arithmetic applies. Results display up to 6 decimal places; stored values retain available precision. Use the units shown.
Practice with an example
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