So many comments about ignorance and poor US education that I'm not going to say....
How hot can it get? Depends on where you live.
Calgary(Western Canada)I've seen temps of 400C(1040F) in the summer and very dry. Winter temps have hit -400C (-400F).
Last summer here in Kingston(Centralish Canada) we had several days of 25-300C(77-860F) with a few of 35-380C(95-1000F). Toss in the humidity of 75-90%....
Halifax Nova Scotia (East Coast) tend to hang at a 200C summer temp and -150C winter temps.
But...how do the dogs pull your sled to store to get oil for your lamps?
Seriously, when i think of Canada, I think of snow and big trees and that is about it. And no, I have no Canadian education, nor have a huge interest in gathering info.
i don't deny being uneducated about the Canadian weather. hell, i'm pretty uneducated about the weather in my own country. but our average summer days in NY are about 85-90*F (~30*C), and it doesn't make sense that Calgary should be hotter than a state that's south of it.
then again, i am only an ignorant American, who's living on his parent's money and is a pure slacker. blame the school systems, not myself - i think i've spent 4 classes studying Canada in my life - and those were all from the French-Indian war.