Forodwaith (lands)
From Tolkien Gateway
The Forodwaith (S., "Nothern lands, people") was an icy region in the far north of Middle-earth, named for the hardy folk who had once dwelt there. Dragons also dwelt in there.
The Forodwaith had been made very cold earlier in Arda's history because of the presence of Utumno and Melkor's evil cold emanating from it. The region remained cold even after Utumno's destruction.