Recently someone mentioned on If you believe, as I do, that stuttering is fundamentally the result of stress/tension-sensitive muscles of the vocal folds (also known as vocal cords) that "lock" when over-tensed, it makes sense that cold weather could make stuttering worse.
This article talks about hygge and what it means to Danes. It talks about how hygge has shaped policies in Denmark, notably its anti-refugee stance. The article talks about the explosion of popularity of the word.