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When will the dog days fall in 2018? When is the hottest day?

Three dog days is the hottest day of the year, and it is also a good opportunity to cure winter sickness in summer. So when does the dog days start in 2018? How many days are there in total? When does the dog days start?

How many rainy days in 2018

There are 40 rainy days in 2018, from July 17, 2018 to August 25, 2018. The specific three dog days schedule in 2018 is as follows:

Early fall of 2018: 10 days from July 17, 2018 to July 26, 2018

MV 2018: 20 days from July 27, 2018 to August 15, 2018

End of 2018: 10 days from August 16, 2018 to August 25, 2018

Three volt date

From the summer solstice to the third day, it is the first day of ambush, from the fourth day to the fifth day, it is the middle day of ambush, and from the first day to the second day after the beginning of autumn, it is the last day of ambush. (every day is 10 days apart) the average number of days is not fixed. There are 4 days between the summer solstice and the beginning of autumn, the average is 10 days, 5 days and 20 days.

The reason for the formation of the "three dog days" is that the surface humidity becomes larger, the heat absorbed is more, the heat emitted is less, and the heat of the surface layer accumulates, so it gets hotter day by day and enters the "three dog days". The accumulated heat of the ground area reaches the highest peak, and the weather is the hottest.

In addition, there is more rain in summer, and the air humidity is large. The heat capacity of water is much larger than that of dry air, which is also an important reason for the sultry weather. In July and August, the subtropical high was strengthened. Under the control of the subtropical high, the downdraft inside the high pressure made the weather clear and cloudless, which was conducive to the sunshine, the ground radiation increased temperature, and the weather was even hotter.

Which one is the hottest in the dog days? The hottest stage in the dog days: Zhongfu

1. When it comes to which one of the three volt days is the hottest, we need to mention the folk saying "cold in Sanjiu, hot in Zhongfu", which means that the hottest day of the year belongs to the "three volt", and the "three volt" is the hottest. After the end of the day, the weather began to cool.

2. First of all, as the surface humidity increases after the fall, the heat absorbed by the ground every day is more, the heat emitted is less, and the heat of the surface layer accumulates, so it gets hotter day by day. Entering the middle voltage, the heat accumulated on the ground reaches the highest value, and the weather is the hottest.

3. In addition, there is more rain in summer, and the air humidity is large. The heat capacity of water is much larger than that of dry air, which is also an important reason for the sultry weather in three rainy days.

4. In July and August, the subtropical high pressure was strengthened. Under the control of the subtropical high, the downdraft inside the high pressure made the weather clear and cloudless, which was conducive to the sunshine, the ground radiation increased temperature, and the weather was even hotter.

5. After entering the final days, the weather is gradually cool. It's cooler in the morning and evening. It's still hot at noon. Each area will be different. Because the last fall is after the beginning of autumn, even the so-called "autumn tiger" is hot in the daytime and cool in the morning and evening.

How to determine the date of Sanfu?

First fall, according to China's calendar law, this is the beginning of a real summer day. The people often say: heat in three volts, cold in three nineties. The three dog days are the season with the highest temperature and humidity in a year, which are divided into the first, the middle and the last, in which the first and the last are fixed for 10 days, some are 10 days, some are 20 days.

At the beginning of the incubation period, it is called in or out, and at the end of the incubation period, it is called out. The number of medium voltage days depends on the time of lodging. Generally, the number of days of lodging before July 28 is 20 days, the number of days of lodging on July 29 is 10 days.