Leshan has formed a variety of climate types under specific geographical conditions. Because the area is close to 29 north latitude, the city belongs to the tropical climate zone of Central Asia, with the characteristics of four distinct seasons, abundant rainfall, the same season of water and heat, and long frost-free period. The annual average temperature is between 16.5- 18.0 degrees, the annual average frost-free period is over 300 days, the annual average frost days are 4.2-9.4 days, and the annual average snowfall days are only 1.0-2.7 days. It is a high-producing area of agricultural and sideline products such as rice, wheat, oil, sugar, fruit and cotton. There are obvious vertical differences in the climate in the southwest mountainous areas. From the foot of the mountain to the top of the mountain, there are complete climatic zones of middle subtropical zone, warm temperate zone, temperate zone and cold temperate zone, and the climatic conditions are very complicated. It is a developed area with comprehensive agricultural management and three-dimensional agriculture, the main producing area of crops such as wood, tea and Chinese herbal medicines, and also a valuable tourism resource. Affected by monsoon and topographic uplift, the climate is humid and the rainfall is abundant. The average annual precipitation in most areas is above 1 1,000 mm, Emei Mountain is above 1 1,500 mm, and only Ebian and Jinkou River are below 1 1,000 mm, with seasonal variations in precipitation. The rainfall in summer and autumn accounts for about 80% of the whole year, and only 20% in winter and spring. The annual precipitation varies greatly, and the minimum annual precipitation is mostly below 900 mm.