T he province stretches for more than 800 km from north to south and consequently spans a large range of latitudes, thereby leading to significant differences in climate between regions at its south and north ends. In fact, the area north of the Great Wall has a temperate arid or semi-arid climate, the rest of northern Shaanxi, the Guanzhong Plain has a warm temperate semi-arid or semi-humid climate, the basin in southern Shaanxi has a northern subtropical humid climate, and most of the mountainous land has a warm temperate humid climate. The temperature generally drops gradually in Shaanxi as you go from south to north. The annual average temperature of all places is 7~16?C, wherein, northern Shaanxi is 7~12?C; Guanzhong is 12~14?C; the shallow mountain valley in southern Shaanxi is the warmest area of the province, mostly 14~16?C. Due to the monsoonal influence, the four seasons are distinct from each other, with a cold winter and a hot summer.