Click on a day for an hourly weather forecast
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.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 9° / 3° | 5 | 24 | 2 | 52 mm | Bad | Shanghai in January |
| February | 11° / 4° | 6 | 20 | 2 | 79 mm | Bad | Shanghai in February |
| March | 15° / 7° | 7 | 24 | 0 | 93 mm | Ok | Shanghai in March |
| April | 20° / 12° | 4 | 26 | 0 | 65 mm | Good | Shanghai in April |
| May | 26° / 17° | 6 | 25 | 0 | 91 mm | Perfect | Shanghai in May |
| June | 28° / 21° | 10 | 20 | 0 | 256 mm | Good | Shanghai in June |
| July | 31° / 25° | 14 | 17 | 0 | 284 mm | Ok | Shanghai in July |
| August | 32° / 25° | 12 | 19 | 0 | 212 mm | Ok | Shanghai in August |
| September | 28° / 21° | 8 | 22 | 0 | 146 mm | Good | Shanghai in September |
| October | 23° / 17° | 3 | 28 | 0 | 62 mm | Perfect | Shanghai in October |
| November | 18° / 12° | 5 | 25 | 0 | 68 mm | Good | Shanghai in November |
| December | 11° / 6° | 5 | 25 | 1 | 60 mm | Ok | Shanghai in December |