Why does Guiyang, Guizhou say "it will not be sunny for three days"? Is it related to geographical location?

There are more than 200 cloudy days a year in Guizhou, which is one of the regions with the most rainy days and the wettest climate in China. In most parts of Guizhou, the annual rainy days are above 150 days, and the average annual rainy days in Guiyang are 188 days. Among them, the rainy days in May averaged as many as 20 days, with the least in 65438+February, but there were still as many as 13 days. It is really worthy of the name that there is no sunny day in Guizhou. Why are there so many rainy days in Guizhou?

Let's look at winter first. At this time, the cold air from the northern mainland has been greatly weakened after a long journey over mountains and mountains. After rising to the rugged Guizhou Plateau, the airflow has moved very slowly. Because the cold air and the warm air originally left in Guizhou meet, the two sides are evenly matched, so they stay here for a long time, resulting in rainy weather.

In spring, the warm air in the south is gradually strengthened and frequently attacked, and the cold air in the north is also quite active. Cold and warm air conflict with each other, so the weather in Guizhou is sunny, cloudy and rainy, and the weather is changeable.

In summer, the cold air in the north moves northward, and the warm and humid air from the southern ocean is active in the Guizhou Plateau. The altitude of Guizhou Plateau is above 1000 meters, and the ground fluctuates, and the warm and humid air is disturbed by topographic uplift, forming clouds and rain. Sometimes cold air from Sichuan meets warm and humid air from the south, which is more likely to form rainy weather or produce strong thunderstorms.

In autumn, the cold air in the north begins to go south, and the warm air cannot retreat. Constant confrontation between cold and warm air often leads to rainy weather.

In a word, the rugged ground in Guizhou Plateau has many opportunities for air uplift, disturbance, blockage, friction and contact with cold and warm air, which is the main reason for the continuous rain in Guizhou.