Shanghai Weather in September
China · Humid Subtropical climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
September in Shanghai sees average temperatures ranging from a low of 22.0°C (71.6°F) to a high of 28.4°C (83.1°F), with a mean of 24.9°C (76.8°F). Compared to the annual average of 17.2°C (63.0°F), this month is 7.7°C warmer than the yearly norm. Precipitation averages 187.3mm, making it approximately 66.0mm wetter than the monthly average of 122.0mm. The city receives an average of 8.2 hours of sunshine per day during September, with relative humidity averaging 80.8%. Wind speeds reach an average maximum of 18.7 km/h. For travelers, this month offers a temperature experience in Shanghai, with wetter-than-average conditions compared to the rest of the year.
Shanghai taught me that 'shoulder season' is everything here. I arrived in early June thinking it was safe — landed straight into plum rain season, three solid weeks of 28°C and 95% humidity. Pack quick-dry everything June mid-July. The real sweet spots are April-May (20°C, low rain) and October (22°C, clear skies). Skip August — typhoon season plus 33°C plus 85% humidity is brutal. Winters (December-February) are damp and cold in a way the thermometer doesn't capture; 4°C feels like -2°C with the wet chill. Bring a down jacket.
September vs Adjacent Months
| Metric | August | September | October |
|---|---|---|---|
| Mean Temp | 29.2°C (84.6°F) | 24.9°C (76.8°F) | 19.1°C (66.4°F) |
| Rainfall | 117.0mm | 187.3mm | 65.0mm |
| Sunshine | 10.4 hrs | 8.2 hrs | 7.3 hrs |
| Humidity | 77.2% | 80.8% | 76.6% |
| Wind | 18.0 km/h | 18.7 km/h | 18.6 km/h |
| Rainy Days | 20.8 | 17.8 | 12.0 |
Seasonal Context
September falls in Autumn in the Northern Hemisphere. Autumn sees temperatures gradually cooling from summer highs. For travelers visiting Shanghai in September, the data indicates mixed conditions based on the combination of temperature, precipitation, and daylight hours.
Frequently Asked Questions
What is the average temperature in Shanghai in September?
The average temperature in Shanghai during September ranges from 22.0°C (71.6°F) to 28.4°C (83.1°F), with a mean of 24.9°C (76.8°F).
How much does it rain in Shanghai in September?
Shanghai receives an average of 187.3mm of precipitation in September, spread across approximately 17.8 rainy days.
What should I pack for Shanghai in September?
Based on September weather data, pack layers including light jackets and t-shirts, plus an umbrella. Rain gear is essential — this month averages 187.3mm of precipitation.
Is September a good time to visit Shanghai?
September is a month with challenging conditions. Plan activities carefully and stay hydrated.
Other Months for Shanghai
Cities with Similar September Climate (Humid Subtropical)
Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: 31.23°, 121.47°. Timezone: Asia/Shanghai. Last updated: 2026-07-30.