Seasons? What are they?

You know, I think it's true what they say about Canada. It's like there are two seasons: Summer and Winter. The thing that I just realized recently, though, is that the changing of seasons is like the switching on of a floursecent tube light. It flickers a bit and then makes up its mind to change. The weather seems to say,
"summer..winter.summer.summer.winter..summer-winter...winter.oh, wait summer summer...oh, all right winter winter winter."