What does it mean when it rains on the summer solstice?

What does it mean when it rains on the summer solstice?
Everyone knows that the summer solstice is a solar term with extremely heavy rainfall. So why is the amount of rainfall so heavy in summer? What impacts does such heavy rainfall have? Let’s take a look! The fifth month of the lunar calendar is the plum rain season, and the rain at this time is very precious for crops. For more content about the fifth month of the lunar calendar, please pay attention to Mr. Shui Mo’s special feature on the fifth month of the lunar calendar!

The meaning and saying of rain on the summer solstice

Many folk sayings and agricultural proverbs related to the 24 solar terms that are circulated in rural areas are the experiences summarized by ancient farmers in long-term labor practice, and are also the solar terms of ancient people's wisdom. These agricultural proverbs are quite accurate in reflecting the solar terms and festivals of the time. Let’s take a look at this proverb separately:
Let’s first look at the first half of the sentence. The literal meaning of “No rain on the summer solstice, hottest days of the dog days” is simple and clear, which means that if it does not rain on the summer solstice, it will be very hot during the dog days of the year. As the saying goes, “The third Geng day after the summer solstice is the first day of the dog days.” Starting from the summer solstice, the third Geng day is the first day of the dog days. As the old saying goes, "The hottest time of the year is during the dog days, and the coldest time is during the coldest days." In fact, in the past there was a custom of starting counting the nine cold days from the summer solstice. There was also a song called "Summer Nine-Nine Days Song" circulating in various places, which accurately described the weather changes after the summer solstice. The hottest time of the year was also the 39th and 49th days, which was from the end of July to the beginning of August. This saying is to predict whether the dog days will be hot or not by whether there is rainfall on the day of the summer solstice, and it has a relatively high accuracy rate. Generally speaking, if it does not rain on the day of the summer solstice, it means that the dog days of summer that year will be quite hot.
Let’s look at the second half of the sentence, “A drop of rain during the summer solstice is worth a thousand pieces of gold.” It means that rainfall during the summer solstice is very precious and very beneficial to the growth of crops. In some places, there is a saying that “a drop of rain on the summer solstice is worth a thousand pieces of gold” and “rain on the summer solstice is like a scholar passing the imperial examination”, which shows that farmers are quite looking forward to rainfall on the summer solstice. In some places, people also use whether it rains on the summer solstice to predict the grain harvest of that year. For example, there is a saying that "if it rains on the summer solstice, there will be rice in the barn", because "rice needs the water of the summer solstice".
This makes sense, because during the summer solstice, the temperature is already very high and the sunshine is very sufficient. Crops grow very fast at this time, so the physiological and ecological water requirements are relatively large. If there is rainfall during this period, the impact on agricultural output will be great and very beneficial. Therefore, there is a saying that "a raindrop on the summer solstice is worth a thousand gold."
The ancients also discovered that whether it rains during the Summer Solstice can also predict the amount of rain in the later period. For example, "If it rains eighteen times during the Summer Solstice, there will be seven or eight rains a day." This means that if it rains during the Summer Solstice, there will be plenty of rain in the later period. If it doesn't rain during the Summer Solstice, there may be a drought that year. There is a saying in this regard: "Grain in Ear, Summer Solstice is the Water Festival. If there is no rain, it is a drought." It can be seen from this that farmers still prefer rain during the summer solstice, as rainfall during this period is very beneficial to the growth of crops.

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