When does Urumqi start to cool down every year?

Urumqi is located in Xinjiang Uygur Autonomous Region. According to meteorological data, the temperature in Urumqi begins to drop in September every year, and the temperature will gradually drop every time it rains. The exact cooling date may be influenced by many factors, such as seasonal changes and weather system. Therefore, it is suggested to know the specific cooling time in Urumqi according to the local weather forecast or the latest information released by the official meteorological department.