Coldest at dawn, is this myth or is there sceince involved?

As I drove into work this morning, the sun just starting to come up I noticed that the tempature gages on my car was dropping. As I arrived, twenty minutes after pulling out of my driveway it was four degrees colder than when I left. I've heard the saying coldest at dawn, but wondered what science (if any) is... show more As I drove into work this morning, the sun just starting to come up I noticed that the tempature gages on my car was dropping. As I arrived, twenty minutes after pulling out of my driveway it was four degrees colder than when I left. I've heard the saying coldest at dawn, but wondered what science (if any) is involved with the saying.
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