Weather changes in Sichuan throughout the year

Sichuan is located in the subtropical zone. Due to the influence of topography, the climate in the basin is quite different from that in the mountainous areas of western Sichuan Plateau.

Sichuan basin belongs to a mild subtropical monsoon climate, characterized by warm winter, spring drought, hot summer and autumn rain. The average temperature of 65438+ 10 is 5へ8℃, the average temperature of July is 25へ29℃, the average annual temperature is 15へ 19℃, and the frost-free period is 280へ300 days. Compared with the middle and lower reaches of the Yangtze River at the same latitude in China, the average temperature in June 5438+ 10 is generally higher than 3℃, and the extreme minimum temperature is generally higher than 10℃, resulting in the climatic characteristics of high humidity, fog and less sunshine in the basin. There are as many as 250 rainy days and 300 rainy days in a year in Chengdu, which has formed a climate characteristic of rainy and less sunshine.

The northwest Sichuan Plateau should be subtropical in latitude, but because of its high terrain, it belongs to a typical plateau climate-most areas have no summer in winter and spring and autumn are connected; Precipitation is small and concentrated; The temperature difference between day and night is large, and the sunshine is strong and sufficient. Its annual sunshine reaches 2500 hours, which is in sharp contrast with the basin. Ganzi is the place with the most sunshine in Sichuan, and it is known as "Small Sun City". The annual average temperature in Shiqu is-1.6℃, the monthly average temperature is-12.5℃, and the extreme minimum temperature is -35.0℃, which is called the "cold pole" in Sichuan.

There is a complete vertical climate division in the mountainous area of southwest Sichuan. For example, there are various representative plants in subtropical zone, warm temperate zone, temperate zone, cold temperate zone, sub-frigid zone and cold zone within 6500m from Dadu River to the top of Gongga Mountain. The glacier marked by the frozen area is only 2800 meters above sea level, which is said to be the lowest glacier at the same latitude in the world. Jinsha River basin has the characteristics of tropical climate in South Asia, similar to Xishuangbanna, Yunnan. The change between dry season and rainy season is very obvious, with May and September as the rainy season and June 5438+00 as the dry season. Sunny and warm in winter, it is a paradise to avoid the cold.