Why does Qingming Festival rain? Why Tomb Sweeping on Tomb Sweeping Day?

Why does it rain during the Qingming Festival? Every year, the Qingming Festival is around April 5, when winter goes and spring comes. The cold air force is not so strong, and gradually weakens. At this time, the subtropical high begins to strengthen its westward extension, and the warm and humid air on the sea starts to move northward, eager to try. The cold and warm air often meet in the south, which causes the south It's a rainy day. It is worth mentioning that this year's southern Qingming rain is largely due to the cold air southward.

Before and after the Qingming Festival, warm and humid air from the ocean was constantly transported to the mainland. There was more water vapor in the atmosphere, which was easy to condense into drizzle at night. Because of these reasons, it rained a lot during the Qingming Festival. In the spring of Jiangnan, there is a lot of low pressure. The clouds in the low pressure walk very fast, the wind is very strong, the rain is very urgent. Every time the low pressure passes through, it will be cloudy and rainy.

The Qingming Festival is held before and after April 5 every year. The summer monsoon from the sea prevails. It will bring a lot of rain and bring convenience to farmers' spring farming. Therefore, it is said that spring rain is as expensive as oil. The warm and humid air flow from the ocean will hover in the north and south of the river, so there is a saying of "continuous spring rain". Nevertheless, it doesn't mean that it will rain every year on Qingming Festival. It can be seen that it does not rain every year during the Qingming Festival.