How can you have warmer weather north of the Cyrodil Northern border? If it already has snow and ice, how can you have warmer weather then? This is why I ask. I can't see Skyrim's southern border be non-artic climate.
Well ive no idea how the sea and streams work in Tamriel XD. But this is how it is in real life, in northern Europe(Norway, Iceland, Russia etc.), it is the inland that is coldest in form of temperature. Even though the north coast can have a effective colder temperature due to the wind. So the coast can feel colder and have harsher weather, but less snow(tho more ice).
Take North-Norway Finnmark for example, at the coast there normal winter temperature is -15 celsius, with a lot of wind. But if you drive 3hours into the inland of that region, it can often be as cold as -50 celsius. Even in the Norwegian island Svalbard this is true. Due to sea obviously.
But since TES dont have seasons etc. and is fantasy world its kinda hard to know.
We'll know once they give out a detailed map i guess or answer it.
Wouldnt really bother me if it was all snow, but could be cool if they added a few small regions without it too(perhaps melted by some sort of magic or whatever).