When we speak of a place’s latitude, we are talking about how far north or south it is. Lines of latitude start from the equator (0 degrees latitude) and go north to the North Pole (90 degrees North) and south to the South Pole (90 degrees South). Each line of latitude runs east to west. Canada, of course, is not just on one east to west line. Instead, Canada stretches a long way from north to south. What this means is that Canada does not just have one latitude. So we cannot speak of the latitude for all of Canada.
The southernmost point in all of Canada is on an island in Lake Erie. It is at 41 degrees and 40 minutes North. The northernmost point in all of Canada is on Ellesmere Island. It is at 83 degrees 6 minutes North.