If I were locked in a windowless, hermetically sealed room (more than usual, I mean) with only access to the web stats for
www.MetroMPG.com, I could easily tell when the weather starts to get cold:
See that recent spike in traffic?
It's people going to the posts I made on the cold weather topics of
information about different types of block heaters, the mini-test I did about how long to plug one in, and why
winter mileage sucks.
Happens every year like clockwork.