It was in the 50s when I got home from Thanksgiving with my parents.
One of the heaters on my fish tanks fried and the tank water was running about 55, I think. Luckily, the tank contained a cool hardy species that encounters temperatures a little lower than usual for several months during the year, but this was really pushing it.
"Bart, don't make fun of grad students. They just made a terrible life choice." -Marge Simpson