Beijing weather in September
September in Beijing: warm, a little rain, with poor air quality — an excellent time to visit.
#4 of 12 months in Beijing · #297 of 604 destinations to visit in September · comfort 80/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Beijing climate normals — September
| Daytime high | 28°C / 82°F | 🌤 warm |
|---|---|---|
| Nighttime low | 16°C / 62°F | |
| Feels like (high) | 28°C / 82°F | |
| Rainfall | 70 mm / 2.7 in | 🌦 some rain |
| Rainy days | 7 days | |
| Humidity | 61% | 💧 humid |
| Dew point | 13°C / 55°F | |
| Sunshine | 9.5 h/day | |
| Daylight | 12.4 h | |
| Wind | 11 km/h / 7 mph | |
| Air quality (US AQI) | 155 | ⚠️ unhealthy |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Beijing in September — FAQ
- Is September a good time to visit Beijing?
- September in Beijing: warm, a little rain, with poor air quality — an excellent time to visit. It ranks #4 of 12 months for Beijing on SeasonMap's comfort score (80/100).
- What is the weather like in Beijing in September?
- In September, Beijing averages a daily high of 27.5°C and a low of 16.4°C, with about 69.5 mm of rain over roughly 6.6 rainy days.
- What is the air quality in Beijing in September?
- Beijing has a mean US Air Quality Index of about 155 in September.