China is a huge country, and has a great variety of climates. Winter is freezing cold in the north, in the mountains and the plateaus, while it's mild in the south; summer is hot everywhere, except in highlands and high mountains. If we exclude the vast western desert areas, where rainfall is scarce and irregular, summer is the rainiest season. The rainiest part of the country is the south-east, while the least rainy is the north-west.