Wind Chill Exposure

NWS 2001 wind chill formula and frostbite-time exposure curves.

Example

You enter

You get

Details, formula, and sources

NWS 2001 Wind Chill: WC = 35.74 + 0.6215 × T − 35.75 × V^0.16 + 0.4275 × T × V^0.16 (T °F, V mph, valid V ≥ 3 mph).

NWS Wind Chill Temperature Index, 2001 revision.

Free at weather.gov/safety/cold-wind-chill.

Estimate. AHJ and licensed professional govern.

Field names used by the API: T_F, wind_mph, wind_chill_F

Frostbite-time table 5 / 10 / 30 min thresholds per NWS tableNWS Wind Chill Chart

Details, formula, and sources

NWS 2001 Wind Chill: WC = 35.74 + 0.6215 × T − 35.75 × V^0.16 + 0.4275 × T × V^0.16 (T °F, V mph, valid V ≥ 3 mph).

NWS Wind Chill Temperature Index, 2001 revision.

Free at weather.gov/safety/cold-wind-chill.

Estimate. AHJ and licensed professional govern.

Frostbite-time table 5 / 10 / 30 min thresholds per NWS tableNWS Wind Chill Chart