-wind speed (ms) 7,- ambient air temperature (C) and the value 33 is the body surface temperature in degrees Celsius. ill The more common equivalent windchi temperature T C) was given by 0045(5.27 Va +1045-028 V) (T,.. 33) + 33 Note that V is expressed in km/h. 14.23 Us to Create a table that shows the windchill temperatures for the range of ambient air temperature -30C