Where to go in Asia in January
January splits Asia in two. North of the tropics it is deep winter: Japan and Korea are cold, and Mongolia and northern China are frozen. South of that line it is the dry season, with the best weather of the year in Thailand, Cambodia, Laos, Sri Lanka's west coast and most of India. If you want sun, go south. If you want snow, onsen and empty temples, go north.
The price of the good weather is crowds and high rates, particularly in the first days of the year. Rooms, guides and flights in the main beach and temple areas sell out early. The northern winter is cheaper, and quieter, but you pay for it in short days and cold. Choose by what you want from the trip and book earlier than you think you need to.