Hot weather means that the temperature is above () degrees Celsius.

Meteorology In China, when the temperature is above 35℃, it can be called hot weather.

Meteorology In China, when the temperature is above 35℃, it can be called hot weather. The highest temperature exceeds 35℃ for several days, which can be called high temperature heat wave. It refers to the continuous high temperature process, which is a meteorological disaster that causes people, animals and plants to adapt to adverse effects due to the long duration of high temperature.