Skyrim is representative of a Dark Age Norweigan society = not much bathing.
When the Danes settled in England one of the complaints the Anglo-Saxons made against them was excessive cleanliness. Compared to Arabs or Byzantines the Norse may not have been models of cleanliness, they didn't build bathouses, then again they did have saunas and were known to bathe more regularly (ie at least every once in a while ) than other North Europeans