[ane]

The actual northernmost French (the Republic) community is in Saint-Pierre-et-Miquelon, which is funnily enough just next to Quebec! it's an overseas territory and they use the Euro as their currency.

https://en.wikipedia.org/wiki/Saint_Pierre_and_Miquelon

[herge]

If you click on the wikipedia links, you can quickly see that Saint-Pierre-et-Miquelon is ~5 degrees south of both Fermont and Dunkirk.

Even Paris is north of Saint-Pierre-et-Miquelon.

[seszett]

By the way since we're talking about France, the article seems to separate metropolitan France and the overseas regions (it lists Saint-Pierre-et-Miquelon as a "country").

Otherwise maybe the chart would show quite a bit more "latitudinal population variation" with the southernmost significant populated place being 20° south of the equator.

[colomon]

It's just next to Newfoundland -- 25 kilometers to there, versus 500ish to get to Quebec.