Phnom Penh weather in October
October in Phnom Penh: sweltering, soaked, with very humid — a fair time to visit.
#11 of 12 months in Phnom Penh · #574 of 604 destinations to visit in October · comfort 53/100 (tier D)
Updated June 2026 · climate normals from ERA5 reanalysis
Phnom Penh climate normals — October
| Daytime high | 30°C / 86°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 24°C / 76°F | |
| Feels like (high) | 36°C / 97°F | |
| Rainfall | 258 mm / 10.2 in | ⛈ soaked |
| Rainy days | 25 days | |
| Humidity | 86% | 💦 very humid |
| Dew point | 24°C / 75°F | |
| Sunshine | 8.3 h/day | |
| Daylight | 11.9 h | |
| Wind | 10 km/h / 6 mph | |
| Air quality (US AQI) | 56 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Phnom Penh in October — FAQ
- Is October a good time to visit Phnom Penh?
- October in Phnom Penh: sweltering, soaked, with very humid — a fair time to visit. It ranks #11 of 12 months for Phnom Penh on SeasonMap's comfort score (53/100).
- What is the weather like in Phnom Penh in October?
- In October, Phnom Penh averages a daily high of 30.2°C and a low of 24.4°C, with about 257.9 mm of rain over roughly 24.8 rainy days.
- What is the air quality in Phnom Penh in October?
- Phnom Penh has a mean US Air Quality Index of about 56 in October.