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The time of great summer in 2018

The summer heat is also the hottest solar term in summer. How many days does it last in 2018? Climate characteristics of great summer heat. Let's learn about it together!

How many days does the summer heat last in 2018

The beginning of the summer heat in 2018: 05:00, July 23, 2018

The end of summer heat in 2018: 21:30, August 7, 2018

That is, 16 days of great summer in 2018.

The great summer is the twelfth solar term in the 24 solar terms. From July 22 to 24 in the solar calendar, the sun reaches the Yellow longitude 120 & deg;, indicating that the weather is extremely hot and the hottest period is coming. At this time, the temperature is the highest, and there are many thunderstorms. In many areas of China, there is often a high temperature of 40 ℃. There are folk customs such as drinking tea, drying ginger and burning incense.

Calculation formula of sunstroke date

The solar term of great summer is determined when the sun's yellow meridian reaches 120 degrees. Some specific time calculated by the people themselves will have a slight error. Zijinshan Observatory is responsible for the compilation and release of China's calendar, which is officially published in the annual Chinese astronomical calendar as a standard, and published in the form of calendar materials. The specific date is calculated by Zijinshan observatory Subject to.

The general calculation formula is: [y * D + C] - L

Interpretation of the formula: y = the last two digits of the number of years, d = 0.2422, l = leap years, C = 22.83 in the 21st century, and 23.65 in the 20th century.

For example, the great heat of 2088 = [88 & times; 0.2422 + 22.83] - [88 / 4] = 44-22 = 22, the great heat of July 22.

Exception: 1922 calculation plus 1 day.

Climatic characteristics of summer heat

High temperature and extreme heat

We all know that the heat is in three volts. The summer heat is usually in the middle of the three volt period. At this time in most parts of China are in the hottest stage of the year, and the temperature difference across the country is not big. It coincides with the saying: "cold in September, hot in the middle". As the name suggests, great heat is hotter than little heat. In China's surface climate data 1971-2000, from the statistics of the extreme maximum temperature in August of 30 years, we can see that the extreme maximum temperature in July in some provinces appears in the late July, and the extreme maximum temperature in August in most provinces appears in the first ten days of August, just in the summer of July and August.

High temperature and drought in the middle and lower reaches of the Yangtze River

In the summer solar term, except for the Qinghai Tibet Plateau and the north of Northeast China, most of the areas are hot. The high temperature of 35 ℃ is common, and the extreme heat of 40 ℃ is not uncommon. Three famous Furnaces: Nanjing, Wuhan and Chongqing are also the most popular before and after the summer heat. There are many places hotter than the three furnaces, such as Anqing, Jiujiang, etc. The hottest places are different every year. The hottest cities from June to August 2003 are Fuzhou, Hangzhou, Changsha and Nanchang. Of course, the hottest "stove" is the "Flame Mountain" in Xinjiang, Turpan. Before and after summer, the temperature in the afternoon is usually above 40 ℃. Xiao Xiong, a Qing Dynasty poet living in Xinjiang, wrote in his poetry collection of miscellaneous stories in the west of Xinjiang that 'try to stick the brick wall of the pancakes, burn it in a small area, and the sun is awesome. It can be seen that the reputation of "Flaming Mountain" is indeed worthy of the name.