Phong Nha weather in August
August in Phong Nha: hot, soaked, with clean air — not the time — 20 rainy days.
#9 of 12 months in Phong Nha · #837 of 897 destinations to visit in August · comfort 49/100 (tier F)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Phong Nha in August
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Phong Nha climate normals — August
| Daytime high | 32°C / 90°F | 🥵 hot |
|---|---|---|
| Nighttime low | 27°C / 80°F | |
| Rainfall | 188 mm / 7.4 in | ⛈ soaked |
| Rainy days | 20 days | |
| Humidity | 78% | 💦 very humid |
| Dew point | 24°C / 76°F | |
| Sunshine | 8.6 h/day | |
| Daylight | 12.7 h | |
| Wind | 20 km/h / 12 mph | |
| Air quality (US AQI) | 40 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Phong Nha in August — FAQ
- Is August a good time to visit Phong Nha?
- August in Phong Nha: hot, soaked, with clean air — not the time — 20 rainy days. It ranks #9 of 12 months for Phong Nha on SeasonMap's comfort score (49/100).
- What is the weather like in Phong Nha in August?
- In August, Phong Nha averages a daily high of 32.4°C and a low of 26.5°C, with about 187.5 mm of rain over roughly 20 rainy days.
- What is the air quality in Phong Nha in August?
- Phong Nha has a mean US Air Quality Index of about 40 in August.