Canadians in most of Canada aren't really bothered by weather, otherwise we'd all be in B.C. We do complain a lot about the weather though, I mean what the hell else is there to complain about other than taxes and the price of gas? What tells me that you're probably right about the temperature is that the cars are sliding like that and it's snowing. What the people are wearing is not necessarily a really good gauge of the temperature. No hats is common for most of the winter, but their jackets are closed which means either it's humid or it's a bit chilly. Probably humid.
Well, y'know, I'm a fin, and while Finland is quite a bit north of most of Canada, we got them natural thermal batteries more commonly known as lakes, and... well, long story short, a lot of Finland is a lot like Canada when it comes to temperatures and whatnot. Ya guys got bit more sun though. Fins aren't terribly bothered with weather either, heck, I used to wear T-shirt up till -5C or -10C...
But what I mean is, you'll definitely notice some changes between people out and about in -10C and people out and about in -30C. Bit more scarves, gloves, woolly hats, faster strides, different posture, lot whiter beards... I'm perfectly happy to accept that there are some people who don't ever wear scarves, gloves or woolly hats, even when their thermometer has gotten the flu, but there'd be a lot more who do at -30C.