It was -9 F for a high with a wind chill factor of -35F during our holiday trip to the Wisconsin Dells . Pretty damn cold.
I have experienced worse in The Dakotas and Canada where the still air temp was an honest -30F and wind chill factor was in the -50F range. This was way back when I was an Engineer and working on military bases and oil facilities.
Can someone convert that to C for me as I am curious what the numbers would be in celsius?