 Those areas are not heavily populated due to the severe climate, where it drops below on most winter days and has a very brief summer season.Some Mountain passes in southern BC also have a subarctic or subalpine climate, creating extremely dangerous driving conditions, as drivers may be unaware of wintry road conditions when they come from nearby areas like Vancouver and Kamloops that are much warmer.The table can be reordered by clicking on the box in each column.