Slate has a great piece on wind chills, and I agree.  Since wind chill is a measure of how quickly heat will leave bare skin, it is almost completely meaningless.  If you are clothed or indoors the wind chill factor doesn't affect you at all, but the temperature matters very much.

Why don't they report wind chills in the summer, when we are outside with exposed skin?  Would that be nice, "Tomorrow will be in the high 90's but with the wind chill factor it will feel like 85."