Out of curiosity, what type thermometer do you guys use to record -30 and -40 degree lows while out in the woods?
Never took a thermometer so don't know most temps exactly. A couple of my -40 times I based camp temps on the neareast town. Nearest town in the CDN Rockies was Banff at -46 and we were higher elevation. In Wells Gray Park years ago the temps in Clearwater were -42 and we were a LOT higher elevation. On a recent bivy, a fellow in a new pick-up told me that his truck thermometer had shown -23 F at dawn that morning. I hadn't thought it was that cold while still hunting at dawn.
I tossed a cup of boiling water up at a 45 degree angle one of the cold times in the CDN Rockies. It made a muffled crackling sort of explosion and nothing came down to mark the unbroken snow. A small cloud drifted away and dispersed quickly. Not sure how cold that is but Jack London used that phenomenon as a measure of deep cold.
