Shanghai weather in September
September in Shanghai: hot, soaked, with very humid — a good time to visit.
#8 of 12 months in Shanghai · #496 of 604 destinations to visit in September · comfort 63/100 (tier C)
Updated June 2026 · climate normals from ERA5 reanalysis
Shanghai climate normals — September
| Daytime high | 27°C / 81°F | 🥵 hot |
|---|---|---|
| Nighttime low | 22°C / 71°F | |
| Feels like (high) | 30°C / 86°F | |
| Rainfall | 183 mm / 7.2 in | ⛈ soaked |
| Rainy days | 13 days | |
| Humidity | 82% | 💦 very humid |
| Dew point | 21°C / 70°F | |
| Sunshine | 7.9 h/day | |
| Daylight | 12.3 h | |
| Wind | 17 km/h / 11 mph | |
| Air quality (US AQI) | 94 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Shanghai in September — FAQ
- Is September a good time to visit Shanghai?
- September in Shanghai: hot, soaked, with very humid — a good time to visit. It ranks #8 of 12 months for Shanghai on SeasonMap's comfort score (63/100).
- What is the weather like in Shanghai in September?
- In September, Shanghai averages a daily high of 27.1°C and a low of 21.9°C, with about 182.8 mm of rain over roughly 13.2 rainy days.
- What is the air quality in Shanghai in September?
- Shanghai has a mean US Air Quality Index of about 94 in September.