I was in Chile a year ago January. I saw some skiable snow scattered here and there. I even got snowed upon once or twice--once right at sea level. But Chile's huge--4500 km long, from Tierra del Fuego to the tropics--and includes temperate rainforests, huge icecaps, maritime mountains, the world's driest deserts, endless dusty steppes, ridiculously large but astonishingly barren volcanoes....and much more. You might stand a better chance of attracting useful answers if you stated where you're actually going.
You might also say something about how far you're willing to walk in search of skiing. And what kind of skiing you're willing to walk for. And then you'll still have to take your best guess as to what sort of snow season they'll get, and what sort of summer melting: like the Cascades, summer snow can vary from sparse to plentiful, depending. If determined, you'll find skiing somewhere or other: January is the functional equivalent of July, and the southern Andes are quite similar to the Cascades or Coast Range, so if you routinely ski here in July you'll manage just fine.
Hope that's helpful, somehow.
Mark
