The northern part of Thedas is divided amongst the Anderfels, the Tevinter Imperium, Antiva, and Rivain, with the islands held by the Qunari across the sea
, just off the northern coast. Nevarra and the Free Marches are technically more central, part of the continent's interior, but given that they're north of Ferelden and northeast of Orlais we've included them as part of "Northern Thedas".
North of the Waking Sea, climates grow far more temperate and eventually, if one goes as far as the Qunari-dominated northern islands, even sub-tropical. While southern Thedas sees snowfall in the winter months, places like Nevarra and the Free Marches experience milder seasons. Kirkwall in particular, however, does see a fair amount of wind and freezing rain during the winter. Heat reigns in the northwest, especially, and is most pronounced in the driest steppes of the Anderfels—the inhospitable region offers little more than oppressive heat and blowing dust. Nonetheless, it is at Weisshaupt in the Anderfels where the first headquarters of the Grey Wardens can be found.