To give you an idea of the temperatures you’ll face whilst in search of the northern lights, the average daily temperatures in degrees Celsius are listed below for Tromsø. Remember, wind-chill factor can reduce these figures.
Tromsø Sep 6.9°C / Oct 2.7°C / Nov -1.2°C / Dec -3.4°C / Jan -4.4°C / Feb -4.3°C / Mar -2.8°C
This occurs when the skin and underlying tissue freeze due to extended exposure to very low temperatures. It can affect any part of your body, but the extremities, such as the hands, feet, ears, nose and lips, are most likely to be affected. However, with the right clothing and sensible precautions frostbite can be avoided.