Since July, several 'stove' cities in southern China have been 'flameout' under the pressure of rain. For example, Chengdu experienced the coolest 'light heat' day in 10 years on July 7, with the highest temperature of only 25 ℃. In this regard, Shi Yan, a meteorological analyst of China Weather Network, explained that since June this year, the location of the Western Pacific subtropical high has been more westward and southward than usual, and the southwest warm and humid air flow is strong; at the same time, the cold air from the north goes southward, and the cold and warm air meet, resulting in more rain and less high temperature weather in the south.
This year's' dog days' are 'initial' from July 12 to July 21, 'moderate' from July 22 to August 10, and 'final' from August 11 to August 20, totaling 40 days.
Today, we are entering the dog days. Dog days are the hottest season of the year. This year, it's still the 40 day extended version of dog days. We should pay attention to the heatstroke prevention and cooling measures.
According to the lunar calendar, it falls on the third day after the summer solstice and on the second day after the beginning of autumn. The length of the first and last ambulation is fixed, both are 10 days. The length of the ambush is determined by the interval between the solar term of "the beginning of autumn" and the first day after it.
Therefore, the mid volt may be 10 days or 20 days, corresponding to 30 days' ordinary version 'and 40 days' luxury version'.