Some years ago CBC produced a show called "The Canadian Conspiracy" about how Canadians were taking over the States (mainly by infiltrating the entertainment industry). Every time they showed a shot of Ottawa it was snowing. Ottawa, January 1972, snowing; March 1973, snowing; July 1973, snowing. The only shot in which they didn't show snow was one done in August.
And then there's the seasons in Northern Ontario - frostbite and flybite.