“I assumed the equator was more or less at the upper edge of Africa/lower edge of Europe”—I’ve met Danes who thought along the same lines, so I’m not sure it’s not a common mistake to make. Just as all of North America is north of the equator and all of South America is south of the equator; I guess it just seems more convenient that way.
On an unrelated note, nobody have explicitly mentioned the Gulf Stream or the North Atlantic Drift in the comments, so I figure I should point out the importance of this one when talking about the climate of Western Europe. I live in Jutland, more specifically quite close to the 56th parallel north—this is equivalent to the Southern parts of Hudson Bay or the Bering Sea, and we have a temperate climate.
“The Equator passes through South America”—I know that. Ecuador’s named Ecuador for a reason. My point was that people get both of these (Africa/Europe & North/South America) wrong.
If you’d read the last link in my post above you’d not have posted the comment you just did.