Probably when the pressure switch on my furnace got stuck open in the middle of January. :biggrin:
Coldest I remember seeing is -50C without the windchill. Thankfully, there was no windchill at all. It was surprisingly not all that bad, but would not want to stay in that longer than I have to that's for sure. The mitts, they do nothing.
I find -30 and colder all feels the same, but wind or lack of wind is really what changes everything. I'll take -40 without wind over -20 with wind.
To think, in about 3 months from now we'll be seeing these temps. Summer is too short.