Were you ever out in the Great Alone, when the moon was awful clear; and the icy mountains hemmed you in with a silence you most could hear. The white land locked tight as a drum and cold fear that follows and finds you, with a silence that bludgeons you dumb.
Discomfort caused by these bitter conditions is affected by wind speed, air temperature and humidity, slowing travel and making outdoor work challenging and often dangerous. Frostbite times take this into account. Air taken into the lungs over long periods wears down the body, while exposed flesh soon needs to be covered again. Numbness of the hands and lower legs is common but not insurmountable as long as good clothing and precautions are taken. Relative temperatures with the wind can drop below -40, -50 or even -60 degrees, producing arctic and even potentially polar conditions.
Needed insulation: 6.63. Suggested clothing includes, a) below the waist: loin cloth, hose, stockings, breeches (linen), trousers (gabardine), boots (fur) and boot covers (leather); b) above the waist: shirt (woollen), doublet, robe, jacket (gabardine), mantle, mittens (knitwear), mittens (outer fur), hat (wool), hat (fur), scarf (woollen). Overtop of this should be worn a full woollen jumper and a heavy coat (fur). This ensemble will provide sufficient insulation for one hour of standing guard outside.
The danger of hypothermia will occur if the character performs more than six minutes of hard physical work, in particular combat. Because of the amount of insulation, whatever the weather, once the 13th combat round has been completed, or heavy work performed, the character will begin to sweat. After that has begun, the character can continue to act for up to two more minutes or 10 more rounds before a constitution check must be made against hypothermia.
A failure will indicate the character has caught a chill. A shudder, and then dizziness will seize the character, causing whomever to drop what they have in their hands and stagger away from combat. The character must find shelter within 8-20 minutes or they will become delirious and act unconsciously. Death in this weather will follow within 21 to 40 minutes, +4 per point of constitution.
See Temperature Grades