Summer is the first 14 of the 24 solar terms. Around August 23rd, the sun reaches150. It is a solar term reflecting the temperature change. According to "twenty-four solar term", "Go and go, and the summer heat will stop here." It means that the summer heat will end on this day, and the temperature in most parts of China will gradually drop, and the heat will soon pass. Especially in northern cities.

The solar term of summer is different from that of light summer and great summer. It represents the transition of temperature from hot to cold. The ancients said: "One autumn rain and one cold", "Three rains in beginning of autumn, linen fans put up high" and so on, all of which are direct descriptions of the climate change during the "summer" season.

Generally speaking, the climate during the summer heat is characterized by hot in the daytime, cool in the morning and evening, large temperature difference between day and night, little precipitation and low air humidity, which indicates that the hottest time of the year has passed.

However, according to past experience, it is difficult for the south to enjoy real coolness for a while after coming out of the "dog days", and the sunny, hot and hot weather will last at least until the first ten days of September. Autumn always makes people feel late, and they often suffer from the "autumn tiger". After the summer heat, it is the White Dew. After the solar term of the White Dew is ushered in, the temperature drops quickly and it is not hot.