The summer of 2018 has been going on for a while. It's about to start autumn. Is the summer over after that. When will the summer of 2018 end? Will it be reheated after autumn 2018? Let's take a look.
When will the temperature drop in summer 2018
After three dog days, it is usually the end of August that the temperature begins to drop.
Every year, July and August are the hottest months, and July and August are the strengthening of subtropical high. Under the control of subtropical high, the downdraft inside the high pressure makes the weather clear and cloudless, which is conducive to sunlight and ground radiation.
After the summer solstice, the position of the sun gradually moves south. Although the sun's irradiation time is increasingly shortened, the distance is also further and further away, and the radiant heat is gradually reduced, but the heat absorbed by the earth is still more than the heat lost every day. When it is accumulated, the heat is more and more big. Therefore, July and August after the summer solstice are the hottest time in the northern hemisphere.
Three dog days should be the hottest time. When the weather falls, the surface humidity becomes larger, the heat absorbed is more, the heat emitted is less, and the heat of the surface layer accumulates. Therefore, it gets hotter day by day, when the accumulated heat of the ground area reaches the highest peak, 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.
When will the summer be off
After the beginning of autumn, the temperature began to decrease.
After the beginning of autumn, there will be a short period of hot weather, known as the autumn tiger. It usually occurs at the turn of August and September and lasts for about 7-15 days.
Because by the middle of August, the hottest MV of the year has ended, and the last MV of 2018 starts from August 16. The hot weather after the beginning of autumn on August 7 is "autumn tiger". Generally, the end of the hot weather is after the autumn tiger. Autumn starts on August 7, 2018. According to the general situation, autumn tigers last for about 7-15 days. So the specific autumn tiger in 2018 is expected to end in August 14-22.
On July 22 or 23 of the Gregorian calendar every year, when the sun reaches 120 degrees of the Yellow meridian, it is the solar term of great summer, which is the last solar term in summer. The solar term of summer is around the middle of the "three dog days", which is the hottest period of the year, with the highest temperature.
Precautions for high temperature in summer
1. It is suitable for wearing sweaty and loose clothes in hot weather.
2. Avoid overwork, ensure adequate sleep, and prepare some commonly used heatstroke drugs when necessary.
3. The symptoms of dizziness, unconsciousness, nausea and chest distress should be taken a rest and cooled down by drinking cold water immediately. If it is suspected that it is heatstroke, it should be rushed to the hospital for treatment immediately.
4. The period of the day with the highest temperature and direct sunlight is between 11 a.m. and 3 p.m., which is the best time to focus on indoor activities, even if you go out, you should take protective equipment.
5. When working outdoors in hot weather, you must wear a sunshade hat and arm protection articles, which can effectively avoid direct sunlight and prevent skin tanning and burning.
6. Heatstroke in hot weather is caused by weakness, dizziness and nausea caused by long-term hot and sultry environment. Therefore, in order to improve the environment in time, we can carry out indoor ventilation, blowing fans and air conditioning, and drink some cold drinks.