Is Xiao Man a solar term reflecting precipitation?

Xiaoman is a solar term reflecting precipitation.

Xiaoman, one of the "twenty-four solar terms", is the second solar term in summer. Xiaoman, battle nail, the sun reaches 60 degrees of the yellow meridian and is celebrated every year on May 20-22 of the Gregorian calendar. A small solar term means entering the rainy season of heavy precipitation, and the rain begins to increase, and there will often be a continuous large-scale heavy precipitation.

Xiaoman, like rain, Grain Rain, light snow and heavy snow, directly reflects the solar terms of precipitation, while Xiaoman reflects the climate characteristics of heavy rainfall "Xiaoman River is full" (south). Another explanation is that the seeds of summer grain in the north are full, but immature, just small and not full (north).

Source of solar terms

During the Xiaoman solar term, there is usually a lot of rainfall in southern China. Due to the active warm and humid air flow in the south, it meets the cold air from north to south in the south of China at the intersection of Huangchi and Jiao Jiao. At this time, there will often be sustained and large-scale heavy precipitation in South China, causing heavy rain or torrential rain, just like the folk saying that "the river is easy to be full".

Jiangnan area, are often rivers and lakes. If there is little rain at this stage, it may be that the Pacific subtropical high is weak and located in the south, which means that it is Huangmei season. In the north, there is little or no rain in the solar terms, during which the temperature rises rapidly and the temperature difference with the south further narrows.

Reference to the above content: Baidu Encyclopedia-Xiaoman