You're also quite likely to have trouble operating any sort of gunpoweder weapon in such temperatures. Gloved hands are poorly suited for the level of manual dexterity needed to do so, but you'll have an enormous chance of losing skin or hands if you try to go without heavy gloves in that sort of weather.


Bows and crossbows would probably suffer from this less, but the cold would probably sap their strength and/or cause them to snap instead of working. Metal swords and armor could also start getting brittle at these temperatures. From what I can find, hardened steel becomes brittle at around -30 Celsius, which isn't that cold for the area you're talking about.