Is there a reason that summer temperatures up at 85 degree latitudes still get up to around 20C/68F? Looking at real-life data, the North Pole seems like it gets somewhat warm-ish because ocean currents keep a steady supply of water going to it all year long, but the south pole, which is land-locked, has a maximum record high of less than 10F, or -12.3C, which is still below freezing.
Should arctic areas in Vintage Story not correlate more with our South Pole? It seems a bit odd that we'd get months of room-temperature weather in an area where there's forty feet of packed ice before you even reach soil.