I've started listening to Ryan Hall on youtube, and unlike these guys, his prediction is that the prairies are going to be pretty warm due to the El Nino this year, and instead the cold burst is going to be further east in Ontario and Quebec.

Though he's American centric, so you can only inference results from his predictive maps, but he does say that there's a high chance (something like 25%) of a massive snow storm either around Chicago or Boston, which also means that the entire area around them including southern Ontario is going to be pretty cold.

Other early winter predictions I've seen suggest that western Canada and the prairies are going to be pretty warm this winter, while Ontario and Quebec is going to be hit by a rebounding polar jet stream. The coasts are going to be pretty wet on both sides, but the prairies are going to be very dry and warm, all the way to including most of northern Ontario.

Every source I've seen contradicts what these guys say aside from the obvious no brainers like BC's forecast.