I just now realized that most maps of earth show the northern pole blue instead of white ... So I guess your world does have pole caps, too?

In any way, the arctic regions are quite small, from the globe projections this looks like the snow-covered zone is somewhere >=80° northern and southern longitude. On earth that border is more like 75° (Asia) or less (Greenland (60°N), Canada (60-70°N), Antarctica (63°S)).

According to Global Warming Science, a world that warm would probably have more extreme and more unpredictable weather that earth.