How long will the high temperature in Tianjin last?

About 40 days. According to meteorologists' prediction, the dog days in 2023 will be hotter than in previous years. The initial stage is expected to start from July 13 and last until July 22nd, the intermediate stage will start from July 23rd and last until August 1 1, and the final stage will start from August 12 and last for about 40 days. In the definition of meteorology, high temperature refers to the weather phenomenon that the daily maximum temperature reaches more than 35℃, and the high temperature weather process lasting more than 3 days is called high temperature heat wave.