I can't recommend Arias and Katos for cold weather. Their metal shells make them very prone to condensation issues. Clogged filters from moisture is already a common issue even in room temperature. Snowy weather might chill the metal shell enough for condensation to form internally, and who knows what damage that's gonna cause.

Rain/snow is going to be risky for any IEM not build for active use, so just get some budget IEMs you can afford to break. The budget market is moving really fast these days and you can get Aria quality IEMs for less than half its price.