"One autumn rain and one cold". Why does the temperature drop significantly after the autumn rain?

This is because generally in autumn, cold air will enter most areas of our country. When it meets the declining warm current in the south, it will form rain, and repeated rainfalls will cause The local temperature drops again and again, which is why we often say that there is an autumn rain and a cold.

In fact, this is generally one autumn rain and one cold. After 10 autumn rains, the temperature will drop. According to the explanations of relevant experts, this is because after the beginning of autumn, although the heat is difficult to dissipate, This can be regarded as the autumn tiger is still causing trouble, but in general the weather is still trending cool, and the temperature difference between morning and evening gradually becomes obvious. It is often very hot during the day and very cool at night.

After entering autumn, cold air will enter most parts of our country from Siberia and Mongolia every year. At this time, they will meet the declining warm and humid air in the south, thus forming rainfall. The cold air moving southward again and again will cause rainfall again and again, which is why the local temperature is getting lower every time.

In addition, during this period, the direct rays of the sun are gradually moving south, and the light and heat received by the northern hemisphere are decreasing day by day, and this is also conducive to the strengthening and southward movement of cold air. After the sub-cold air moves south, the local temperature will drop significantly. This is the reason for one autumn rain and another cold.

After a long period of rain, it is probably the end of autumn and the beginning of winter. At this time, people will put on cotton-padded clothes to keep out the cold, so we have the proverb above.

In fact, to elaborate, there are many proverbs about weather in our lives. These are summed up by the older generation based on years of experience. They are comparable to weather forecasts, and the ancients also used them. There are ways to predict wind and rain, such as frogs calling for heavy rain or swallows flying low to make rain.