China has a highly varied climate and landscape due to its extensive topography. In the north, winters are long and cold while summers are short with much sunshine. Precipitation is limited in northwest China where winters are cold and summers are hot. South of the Nanling Mountains, rains are prolific and the temperature is high year-round. Central China sees four distinct seasons in areas like the Yangtze River valley. Climate also differs across southwest China's elevated and mountainous terrain.