Skip to content

NWS Wind Chill: Formula and Applicability

Calculate NWS wind chill with unit conversion and exact temperature and wind applicability checks, then save the observed conditions.

Use this result well

Inputs that matter
Air temperature (selected unit), Temperature unit, Wind speed (selected unit), Wind-speed unit, and 1 more
Output to expect
NWS wind chill and applicability
  • Check the units and required inputs before comparing results.
  • Keep the assumptions with a copied result so you can reproduce the calculation later.
Was this tool helpful?

Related Tools

Tools you might need next

NWS Heat Index: Method and Humidity Adjustments

Calculate the NWS heat-index estimate with its simple method, Rothfusz regression and humidity adjustments, keeping model limits visible.

Recommended next stepMeteorology
Wind Components: Bearings and Variable Sectors

Resolve signed headwind and crosswind from true bearings, or compare component extrema across a complete wind direction and speed sector.

Recommended next stepAviation
Wind Chill Index

Calculate NWS wind chill equivalent temperature from air temp and wind speed. Free nws wind chill index tool for nws, wind, and more.

Meteorology

Reference & details

How it works

NWS wind chill and applicability

Compute the NWS wind-chill temperature only when air temperature is at or below 50°F (10°C) and wind is above 3 mph. An out-of-domain input receives no wind-chill value; air temperature is shown separately.

WC°F = 35.74 + 0.6215T − 35.75V^0.16 + 0.4275TV^0.16; T in °F, V in mph.

Updated: September 2026

Example Scenarios

Use the example to inspect the method and breakdown, then enter your own documented observations or equipment data.

→ 6.218885°F NWS wind chill

FAQ

Compute the NWS wind-chill temperature only when air temperature is at or below 50°F (10°C) and wind is above 3 mph. An out-of-domain input receives no wind-chill value; air temperature is shown separately.

Retain the measurement time and location, equipment or source document, units and assumptions. Examples illustrate the calculation and must be replaced with your own actual data before saving a personal case.

Use Save planning case for an explicit local history entry. Copy MD includes inputs and notes; Download CSV exports the result breakdown. Keep portable copies and save a separate case after changing the assumptions.

About NWS Wind Chill: Formula and Applicability

Compute the NWS wind-chill temperature only when air temperature is at or below 50°F (10°C) and wind is above 3 mph. An out-of-domain input receives no wind-chill value; air temperature is shown separately.