What's the weather like in Beijing in September?

I simply answered two words, but I didn't expect so many friends to click in favor of me. Then I will reply more. The summer in Beijing has just passed in September, and it is often sultry or dry and hot in Beijing, but it is mainly dry and hot in September, and occasionally sultry. In short, it's still a little hot, and short sleeves are needed. The highest temperature in September will also hover around 30-37. But the question asked by the landlord is rather strange. Is it necessary to go to school for a month in Beijing? If it takes a long time, whether it is hot or not in September, you should bring clothes for at least autumn and winter.