Guangzhou weather in September
September in Guangzhou: sweltering, soaked, with poor air quality — a fair time to visit.
#9 of 12 months in Guangzhou · #561 of 604 destinations to visit in September · comfort 52/100 (tier D)
Updated June 2026 · climate normals from ERA5 reanalysis
Guangzhou climate normals — September
| Daytime high | 31°C / 88°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 25°C / 77°F | |
| Feels like (high) | 37°C / 99°F | |
| Rainfall | 210 mm / 8.3 in | ⛈ soaked |
| Rainy days | 20 days | |
| Humidity | 82% | 💦 very humid |
| Dew point | 24°C / 75°F | |
| Sunshine | 9.2 h/day | |
| Daylight | 12.3 h | |
| Wind | 12 km/h / 7 mph | |
| Air quality (US AQI) | 108 | 😷 poor |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Guangzhou in September — FAQ
- Is September a good time to visit Guangzhou?
- September in Guangzhou: sweltering, soaked, with poor air quality — a fair time to visit. It ranks #9 of 12 months for Guangzhou on SeasonMap's comfort score (52/100).
- What is the weather like in Guangzhou in September?
- In September, Guangzhou averages a daily high of 31.3°C and a low of 24.8°C, with about 210.4 mm of rain over roughly 19.8 rainy days.
- What is the air quality in Guangzhou in September?
- Guangzhou has a mean US Air Quality Index of about 108 in September.