Sapa weather in September
September in Sapa: sweltering, rainy, with clean air — a good time to visit.
#7 of 12 months in Sapa · #476 of 604 destinations to visit in September · comfort 65/100 (tier C)
Updated June 2026 · climate normals from ERA5 reanalysis
Sapa climate normals — September
| Daytime high | 29°C / 83°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 27°C / 80°F | |
| Feels like (high) | 34°C / 93°F | |
| Rainfall | 149 mm / 5.9 in | 🌧 rainy |
| Rainy days | 20 days | |
| Humidity | 81% | 💦 very humid |
| Dew point | 24°C / 75°F | |
| Sunshine | 10.2 h/day | |
| Daylight | 12.1 h | |
| Wind | 18 km/h / 11 mph | |
| Air quality (US AQI) | 36 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Sapa in September — FAQ
- Is September a good time to visit Sapa?
- September in Sapa: sweltering, rainy, with clean air — a good time to visit. It ranks #7 of 12 months for Sapa on SeasonMap's comfort score (65/100).
- What is the weather like in Sapa in September?
- In September, Sapa averages a daily high of 28.6°C and a low of 26.5°C, with about 148.9 mm of rain over roughly 19.8 rainy days.
- What is the air quality in Sapa in September?
- Sapa has a mean US Air Quality Index of about 36 in September.