Warmest vs coldest towns of Argentina

I reckon Koppen's tundra definition is almost as flawed as his subtropical one. The 10C warmest month boundary is hundreds of km poleward of the treeline in parts of Canada (around Hudson Bay), and too close to the equator in the southern hemisphere.

I think John F. Griffiths definition of a tundra climate (less than 3 months above 6C) is a more reasonable definition. Tierra del Fuego is no longer in the tundra category, but treeless places around Hudson Bay are.

Anyway for this battle my vote goes to the warmer town.

At least the town seems to be sheltered from the typical strong winds of those latitudes.

I think there's a single tree species that occurs naturally around Tolhuin, the ñire or antarctic beech (Nothofagus antarctica). Another species, the lenga beech (Nothofagus pumilio), starts getting common in the wetter and more mountainous south. Both species are deciduous and together conform the bulk of the forests in the interior of the island. There are other 5 tree species in the archipelago, all of them evergreen, which form evergreen or mixed forests along the southern coast.

Not the whole archipelago has forests. The northern (and drier, and windier) part has a steppe biome, with few flag trees. The eastern part of the main island is full of peat bogs, the "Magellanic moorland", although the Staten island does have some miraculously forested spots with guindos or Magellanic beech (Nothofagus betuloides), even though that place averages like 7.5C in its warmest month. On the other hand, the windward islands in SW Chile are just tundra.