Wind chill temperature is defined as that temperature in calm air which provides the same chilling effect on a person
as that for a particular combination of temperature and wind. The chart below allows you to estimate the wind chill temperature
for a variety of temperature and wind speeds.
The importance of the wind chill index is as an indicator of how to dress properly for winter weather. Wind chill does
not affect your car's antifreeze protection, freezing of water pipes, etc. In dressing for cold weather an important factor
to remember is that entrapped insulating air warmed by body heat is the best protection against the cold. Consequently, wear
loose-fitting, lightweight, warm clothing in several layers. Outer garments should be tightly-woven, water-repellant and hooded.
Mittens snug at the wrist are better protection than fingered gloves.
Wind speeds greater than 40 mph have little additional effect on chilling. In using the table below, values of wind chill
below -10° F are considered bitterly cold. Values of wind chill below -20° F are extremely cold -- human flesh will begin
to freeze within one minute!
