Bad way to start the day.
December 19, 2011 12:33 AM Subscribe
The air is usually very dry in the winter. Why are my car windows always frosted over without exception?
posted by WhitenoisE to Science & Nature (6 answers total)
If my car windows are very dry when I park my car at night, and it doesn't rain or snow or anything, and the air is so dry that my skin starts to flake, why is there a millimeter of ice on my car windows? Where is this moisture coming from? Obviously it comes from the air, but how does this work? During the summer when it's humid, my car windows aren't usually wet in the morning.