Phnom Penh weather in August
August in Phnom Penh: sweltering, soaked, with clean air — a good time to visit.
#7 of 12 months in Phnom Penh · #482 of 604 destinations to visit in August · comfort 61/100 (tier C)
Updated June 2026 · climate normals from ERA5 reanalysis
Phnom Penh climate normals — August
| Daytime high | 32°C / 89°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 25°C / 77°F | |
| Feels like (high) | 37°C / 99°F | |
| Rainfall | 170 mm / 6.7 in | ⛈ soaked |
| Rainy days | 24 days | |
| Humidity | 80% | 💦 very humid |
| Dew point | 24°C / 75°F | |
| Sunshine | 9.2 h/day | |
| Daylight | 12.5 h | |
| Wind | 15 km/h / 9 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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Phnom Penh in August — FAQ
- Is August a good time to visit Phnom Penh?
- August in Phnom Penh: sweltering, soaked, with clean air — a good time to visit. It ranks #7 of 12 months for Phnom Penh on SeasonMap's comfort score (61/100).
- What is the weather like in Phnom Penh in August?
- In August, Phnom Penh averages a daily high of 31.9°C and a low of 25.2°C, with about 170.4 mm of rain over roughly 23.8 rainy days.
- What is the air quality in Phnom Penh in August?
- Phnom Penh has a mean US Air Quality Index of about 40 in August.