Shanghai is typically warm in September.

Maximum temperatures go down compared to the previous month from +90°F to +82°F. The minimum temperature also goes down from +79°F to +72°F.

It’s generally warm, but pack a long-sleeve shirt for evenings.

September is one of the warmest months in Shanghai, here is the comparison with other months:

September weather is still as ok as in August. It’s getting colder in September. From +90°F in the day, the average maximum temperature lowers to +82°F. As September arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 169 mm to 127 mm. It feels drier, as humidity decreases from 78% to 76%. The average wind speed doesn’t change much during September, staying around 3 m/s. The good news is there are likely to be more sunny days in September, from 4 to 6.

But maybe it is worth considering traveling in October as the weather gets better.

The climate in Shanghai in September has not changed that much over the last 43 years.

The average temperature was the lowest in 1980 (+65°F) and the highest in 2016 (+72°F). The driest year was 2003 with only 716 mm of rainfall, and the wettest year was 2023 with 3129 mm.

For this page, we’ve looked at the typical weather in Shanghai, based on historical hourly weather data from January 1, 1979, to December 31, 2023.

For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.