Bosses have their own weather types so properly summoning one would clear that blizzard, but it's still your own fault for deciding to head out in a blizzard to begin with and not waiting it out. Mountains are dangerous during night and that's something summoning the boss won't mitigate in any way. The blizzard just becomes different-looking in night, it's actually the same weather and can't really follow one after another.

The wolf hunting event is an unfortunate coincidence, but it can happen anywhere in mountains or plains and at virtually any time (with a cooldown) and can mess up plans.

Originally posted by Suddenly_A_Panda:

a full wave of goblins with a shaman and hobgobelin alongside a troll. And ALL of them aim for ME.

This won't happen in a normal game. Trolls can't spawn in mountains under any conditions and fuling invasions (which is the only time when shamans or berserkers can appear outside of plains) cannot occur until Moder has been defeated, and even then it couldn't have been an invasion event if the hunt had already happened. The fuling invasion can also only occur on a base with at least three objects.

I can't tell what was going on there, either you jumped into a fuling village (which cannot spawn even near Moder's altar) and lured a troll with you there to escape from the wolves, or someone is trolling you on a server.

Either way, aside from fulings and the troll, it's just Valheim doing Valheim things. Time for a corpse run and retry or get a new set of backup gear (which every player should have) and retriever your original stuff while better equipped.