Vang Vieng weather in September
September in Vang Vieng: sweltering, soaked, with clean air — a fair time to visit.
#7 of 12 months in Vang Vieng · #545 of 604 destinations to visit in September · comfort 56/100 (tier D)
Updated June 2026 · climate normals from ERA5 reanalysis
Vang Vieng climate normals — September
| Daytime high | 30°C / 85°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 23°C / 73°F | |
| Feels like (high) | 36°C / 97°F | |
| Rainfall | 271 mm / 10.7 in | ⛈ soaked |
| Rainy days | 27 days | |
| Humidity | 91% | 💦 very humid |
| Dew point | 24°C / 75°F | |
| Sunshine | 8 h/day | |
| Daylight | 12.2 h | |
| Wind | 6 km/h / 3 mph | |
| Air quality (US AQI) | 29 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Vang Vieng in September — FAQ
- Is September a good time to visit Vang Vieng?
- September in Vang Vieng: sweltering, soaked, with clean air — a fair time to visit. It ranks #7 of 12 months for Vang Vieng on SeasonMap's comfort score (56/100).
- What is the weather like in Vang Vieng in September?
- In September, Vang Vieng averages a daily high of 29.6°C and a low of 22.9°C, with about 270.9 mm of rain over roughly 27.2 rainy days.
- What is the air quality in Vang Vieng in September?
- Vang Vieng has a mean US Air Quality Index of about 29 in September.