It always rains in Tomb-Sweeping Day. Is there any scientific explanation?

During the Qingming period, most parts of China are in the alternate season of winter and spring, with frequent convection of hot and cold air and high probability of rainfall. Moreover, Tomb-Sweeping Day is also the traditional grave-sweeping time in our country, and people's psychology is relatively heavy. They feel even more depressed when it rains. Therefore, the impression of rain is remembered, and there is no memory without rain.

During the Qingming Festival, there are many rains, and they all go to the graves of the deceased; The question why it always rains in Tomb-Sweeping Day bothers me.

The scientific explanation is;

1, the cold air gradually weakened, and the warm and humid air over the ocean began to move northward actively. Before and after Tomb-Sweeping Day, cold and warm air often meet, thus forming rainy weather.

There is a lot of low pressure in spring. The clouds in the low pressure move fast, the wind is strong and the rain is urgent. Whenever the low pressure passes, there will be rainy weather.

3. Before and after Tomb-Sweeping Day, there was a lot of water vapor in the atmosphere, which easily condensed into Mao Mao rain at night. For these reasons, there are many rainy days in Tomb-Sweeping Day.

Before and after Qingming, the cold air weakened and the subtropical high moved westward. The warm and humid air currents in the ocean are active and sad, and the cold and warm air currents often meet in the south, all of which dominate the enemy and lead to continuous rain in the south. There are many cards in the south in spring, and the card balance is windy. It won't be the second crossing, but it will be rainy. Before and after the Qingming Festival, the warm and humid air currents in the ocean continued, which led to the formation of rain in Mao Mao.