An unofficial temperature of -77.5C was recorded in the canadian Mt logan (2nd highest mountain in north America) on May 26th 1991. If such an astounding figure can be recorded during late spring and early summer, surely this location has the potential not just to be the coldest in the northern hemisphere but even the world. We should be installing official weather stations there quickly (although I recon we will see a new record sooner or later with Dome A in antartica, its already clocked -83C and its only been operating since 2005.)
Edit: Before anyone asks, yes I am sick of the heat and I can't wait for it to end. 
2024/2025 Snow days (850hpa temp):10 days with snow/sleet falling
18/11 (-6), 19/11 (-6), 23/11 (-2), 22/12 (-5), 04/01 (-5), 05/01 (0),14/02 (0), 15/02 (0)12/03 (-6), 13/03 (-6),
2023/2024 8 days 29/11 (-6), 30/11 (-6), 02/12 (-5), 03/12 (-5), 04/12 (-3), 16/01 (-3), 18/01 (-8), 08/02 (-5)
2022/2023 7 days 18/12 (-1), 06/03 (-6), 08/03 (-8), 09/03 (-6), 10/03 (-8), 11/03 (-5), 14/03 (-6)
2021/2022 12 days
26/11 (-5), 27/11 (-7), 28/11 (-6), 02/12 (-6), 06/01 (-5), 07/01 (-6), 06/02 (-5), 19/02 (-5), 24/02 (-7), 30/03 (-7), 31/03 (-8), 01/04 (-8)