The weather in Shanghai in September is hot. The average temperatures are between 21°C and 28°C.
You can expect rain for roughly half of the month of September in Shanghai. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Shanghai in September 2025.
If you’re planning to visit Shanghai in the near future, we highly recommend that you review the 14 day weather forecast for Shanghai before you arrive.