But for people from warm weather, we don't know how to "dress accordingly". It took me a while to figure out that when I was cold in cold weather, it's not because I'm so weak but because the winter clothes that I buy in warm places are only for looks. The real clothes designed for people in cold weather has little features that help keep body heat in and cold air out, designed for utility rather than style. Even shoes too...
Of course nowadays we can go online and shop. But I tried to make do with what I have already, not wanting to buy pricey things I'd use once a year or less, figuring if I bring all my thick clothes and layer them one on top of the other it would work, but sadly it didn't. : (
My hot tips is layers. Even I do that. I don't do wool, down, fur, etc., but layers are good.
I'm often travelling through different climate zones, and yes, the layers thing works well. Being from Canberra, I have a range of warm clothing, but I can't cram all of that into my luggage and cart it around the world.
So long as there is a wind-proof, water-proof outside layer, what goes underneath can be one layer or a hundred.
Hot tip: arrive early and hunt through thrift shops. In the tourist destinations, travellers will often discard bulky winter clothes they don't want to lug home. You can pick up a greatcoat for a song, and leave it behind when you fly out.
I generally leave something behind in the taxi to the airport. A book, an article of clothing, a bottle of something nice, a passport…