My daughter visited us from Columbus that weekend and it was colder in Athens, GA that day than C-bus. It was windy and occasionally drizzling rain at about 38°F, just about the worst conditions possible really short of being below 10°F and very windy.
I recall once in Cincy going outside for more wood, it was -18°F and the wind was howling, I think that is the coldest I've experienced short term.