It depends on where (and when in autumn) in Canada you mean, so a very broad answer is, "yes!" I.m used to the timing of the peak colours in Vermont, so with as a guide and knowing it peaks further north earlier, I'd say sometime in Sept is peak.
Good guides are the various Province tourism websites that dedicate sections to the Fall Foliage, here's a page with many links: http://gocanada.about.com/od/outdooradventuretravel/tp/fall_foliage_reports.htm
For the US weather.com has a tracker- they may have a section for Canada too. almost 7 years ago