And let me add... wind chill is a relation no how quickly something will loose heat. An object (like a car, or other inanimate object or something that does not generate heat) will only cool down the the ACTUAL Temperature. It will not get any colder.

Again, wind chill only lets one realize how quickly something warm will cool down the the ambient temperature.

I just left my work site, and came home where it was 60 degrees warmer at home. Ambiant temp at my work location was -25F, home it was 35F.