Today, the beginning of autumn, in the 24 solar terms, represents the end of summer and the coming of autumn, but we do not feel cool, still feel extremely hot. How long will it be hot after the beginning of autumn? How does the temperature change after the beginning of autumn? Let's get to know.
How cool is it after autumn 2018
After the beginning of autumn, it will not be cool immediately. After the beginning of autumn, it is the proverb "autumn tiger". It will be hot for a while, and the weather will slowly turn cool about a month and a half after the beginning of autumn.
After the beginning of autumn, it is an inevitable trend for the weather to cool gradually, but it also takes time for the temperature to cool. Moreover, the heat treatment of this year has not yet arrived. The weather must be hot for a period of time. The weather will be hot in the half month before the heat treatment on August 23.
In autumn, the direct point of the sun moves from 11 & deg; 32 & prime; n to 5 & deg; 57 & prime; n. With the sun's direct point moving southward, the daytime time is shortened, and the sunshine hours are decreasing day by day, and the light and heat given to the northern hemisphere are decreasing day by day. With the decrease of solar radiation, the heat available to the ground in the daytime is gradually reduced. As the night lengthens, the heat radiated from the earth's surface to space increases. As the heat absorbed by the ground is gradually less than the heat lost from the ground, the temperature begins to change from high to low.
How long will it be hot after the beginning of autumn
After the beginning of autumn, there will be a hot autumn tiger.
There is a saying in the folk that "the cool wind comes on the third day of the beginning of autumn". According to the experience over the years, the weather will be hot for some time after the beginning of autumn, not long. Generally speaking, there are 18 days of fire after the beginning of autumn. After 18 days, it's cooler in the morning and evening. The weather at that time is more comfortable than that in July.
However, most areas are still dominated by sunny and cloudy weather after the beginning of autumn. The rainfall weather is not obvious, and the temperature can still reach 31-33 ℃. The daily average temperature is still high, and the weather is still 'sultry'. As the temperature difference between morning and evening and noon becomes larger, people's body temperature in the morning and night will be lower than that in the previous days.
Temperature change after the beginning of autumn
There is a folk saying that "cool wind comes on the third day of the beginning of autumn", but most of the areas are still sunny and cloudy after the beginning of autumn. The rainfall is not obvious, and the temperature can still reach 31-33 ℃, the daily average temperature is still high, and the weather is still "sultry". However, as the temperature difference between morning and evening and noon becomes larger, people's somatosensory temperature in the morning and night will be lower than the previous days.
There will be autumn tiger weather after the beginning of autumn. Autumn tiger is a short-term hot weather after the beginning of autumn. It usually occurs at the turn of August and September and lasts for about 7-15 days. The reason for the formation of the autumn tiger is that the subtropical high in the Western Pacific Ocean, which controls China, gradually moves southward in autumn, but then moves northward. Under the control of the high, there are clear clouds, strong solar radiation and rising temperature. This kind of regenerative weather is called "old woman summer" in Europe and "Indian summer" in North America.
Because of China's vast territory, the performance of "autumn tiger" is slightly different. For example, the autumn tiger in South China comes later than that in the Yangtze River Basin, generally delaying 2-4 seasons. In addition, the control time of the autumn tiger varies from half a month to two months every year; sometimes the autumn Tiger comes, goes and looks back. Although the temperature of autumn tiger is high, the air is dry and sunny in general. It's not very hot sooner or later, so it won't be too hot to breathe.
Besides, autumn is the transitional season between summer and winter. In autumn, the direct point of the sun moves from 11 & deg; 32 & prime; n to 5 & deg; 57 & prime; n. With the sun's direct point moving southward, the daytime time is shortened, and the sunshine hours are decreasing day by day, and the light and heat given to the northern hemisphere are decreasing day by day. With the decrease of solar radiation, the heat available to the ground in the daytime is gradually reduced. As the night lengthens, the heat radiated from the earth's surface to space increases. As the heat absorbed by the ground is gradually less than the heat lost from the ground, the temperature begins to change from high to low.