NOTE: Speeds of 4 miles per hour or less have little effect on the wind chill.

Fact about wind chill:  According to the chart above, an actual temperature of 30 °F coupled with a wind speed of 35mph provides a wind chill of -4°F.  However, if you tied a 60°F container of your favorite beverage to the roof of your car on a dry, 30°F still day and drove at a speed of 35mph, the temperature of the container and it's contents would never fall below the 30°F ambient air temperature.  Perhaps a better way to explain this is to imagine you are driving your car at 55 mph on a rainy day.  It's 40°F outside, and the calculator above says that those conditions produce a wind chill of 9°F.  Water freezes at 32°F.  Does the rainwater on your car freeze?  No, of course it doesn't.  The foregoing proves that wind chill and temperature are not the same thing.  Wind chill relates to the rate of speed that heat is lost to reduce the temperature of an object to the temperature of it's surroundings.  In the example of the beverage container, the temperature of the container and it's contents would fall to the 30°F ambient temperature at a rate equivalent to it's being placed in a -4°F environment with still air.   Wind chill is a comparative expression relating to the rate of heat loss under particular conditions, not an actual temperature.