The weather is not a factor in Canadian urbanization, other than the extreme northern parts of the territories. Much like in America, cities are not clustered in certain temperature bands, but rather around economic resources, such as ore deposits or ports.
Since World War Two, Canada has achieved a significant amount of economic integration with the United States. Canada simply could not match the massive amounts of industrialization, so it soon became an easy expansion market for U.S. firms. Canada's domestic firms are mostly built around resource exportation, minerals and power, which are the leading exports to the U.S. The North American Free Trade Agreement (NAFTA) only increased these trends. To that end most cities will continue to be based close to the border in order to conduct cross border trade.
Eastern Canada has a number of natural and man-made waterways, the largest being the Great Lakes and its associated rivers. On the ground, Canadians can take advantage of the American highway system that parallels the border.
