The weather in Shanghai in September …

The average temperature in September in Shanghai is between 22-30 degrees, which is slightly cooler than that in midsummer, especially in the morning and evening. If you go in late September, the weather may be cooler. The precipitation is neither too much nor too little, just right, depending on the situation, but it is less than rainy summer in July and August. The sun is still very strong. I suggest you take an umbrella.