How do summer temperatures in the Arctic parts of the Northwest Territories compare with those in the Mackenzie Lowlands?

Summer temperatures in the Mackenzie Lowlands are relatively mild, with average July temperatures reaching approximately 60 °F (16 °C) at most settlements along the Mackenzie River.1

In contrast, the Arctic regions located north and east of the timberline experience significantly cooler summers. In these areas, average temperatures do not rise above 50 °F (10 °C), even during the month of July.1