Deep Freeze

When Whitehorse weather is posted as a low of -34C we usually see a bit colder at our place out near Lake Leberge. We seem to live in a small temperature sinkhole which can be wildly different from the temperatures around us. Like this morning when I woke up early the temperature was -47 and Whitehorse was supposed to be a balmy -34 or so. I wonder what it is about this spot that makes it so much colder at times? When it get colder than -45C experience tells me that metal starts to do strange things - like break. The car doesn't run so well (if at all) so today was a home day. Even our pets are all inside. If the temperature warmed up to -30 it would seem pretty warm now.