If it's below zero degrees (Fahrenheit), or the windchill dips below -18, it's best to stay indoors and limit any skin exposure to less than 30 minutes outside. Things are getting more than a ...
When dressing to run in cold weather that’s in the area of below 30 degrees Fahrenheit, the rule of thumb is to add 10 to 20 degrees to the outside temperature to calculate your running temperature.