What's the weather like?
The winter months offers a clean and crisp air. January to March can be quite cold, with temperatures between -10C down to -25C. But proper clothing will mean that the cold will not get in the way of exploring the nature.
In January and February, the daylight is limited as the sun rises late and sets early, which makes them ideal months for spotting the northern lights. Towards March the days are much lighter, with more hours of sunlight.