see:

TABLE

Wind Chill Temperature (WCT) is the temperature it "feels like" outdoors and is based on the rate of heat loss from exposed skin caused by the combined effects of wind and cold. As the wind increases, the body is cooled at a faster rate causing the skin temperature to drop; for example, a temperature of -10C and a wind speed of 30 km/h will produce a wind chill temperature of -20C. In 2001, National Weather Service implemented an updated WCT index  [N17] .

 
 

 
 

COLD: generally unpleasant; COLDER: unpleasant; VERY COLD: very unpleasant, frostbite possible < 30 min, exposed skin can freeze within 5 min; BITTER COLD: frostbites times < 10 min, exposed skin can freeze within 3 min; EXTREMELY COLD: frostbites likely < 5 min, exposed skin can freeze within 1 min, outdoor activity becomes dangerous; FRIGIDLY COLD: exposed skin can freeze in 30 seconds.

 
   
UPDATED : 2005-04-16 WEBSITE  EDITOR : Krešimir J. Adamić