Does the summer heat begin on the day of the solar term?

The day of the summer solar term is the beginning of summer.

The heat is in the middle of the dog days. At this time, most parts of China are in the hottest stage of the year, and the temperature difference across the country is not large. Isn't there a proverb: "Cold is in March 9th, heat is in the middle." In big countries, the weather is even hotter in summer.

According to the surface climate data of China1971~ the statistics of extreme maximum temperature in August of 30 years in 2000, it can be seen that the extreme maximum temperature in July in some provinces and regions appeared in late July, and the extreme maximum temperature in most provinces and regions appeared in early August, just in the summer of July and August of the following year.

The summer heat is also the season with the most thunderstorms. As the saying goes, "there is no drop in the east, and there will be rain in the west", which means that in summer, if there is lightning in the east, it will not rain generally, but if there is lightning in the west, it will rain soon.