-27C!
I hope I never have to experience that again. I'd be a happy man living the rest of my life above 0 (40F).
Now, I think 15C is cold... I lost my thick skin and don't want it back!

Oh, and we brew our own beer here as well... in small quantities. A few of us import hops and we get together to taste the results. Not perfect but always enjoyable every time!