Phnom Penh weather in January
January in Phnom Penh: sweltering, dry — one of the best months to visit.
#2 of 12 months in Phnom Penh · #224 of 604 destinations to visit in January · comfort 76/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Phnom Penh climate normals — January
| Daytime high | 31°C / 88°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 22°C / 72°F | |
| Feels like (high) | 34°C / 93°F | |
| Rainfall | 20 mm / 0.8 in | ☀️ dry |
| Rainy days | 2 days | |
| Humidity | 71% | 💧 humid |
| Dew point | 20°C / 67°F | |
| Sunshine | 9.8 h/day | |
| Daylight | 11.5 h | |
| Wind | 13 km/h / 8 mph | |
| Air quality (US AQI) | 71 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Phnom Penh in January — FAQ
- Is January a good time to visit Phnom Penh?
- January in Phnom Penh: sweltering, dry — one of the best months to visit. It ranks #2 of 12 months for Phnom Penh on SeasonMap's comfort score (76/100).
- What is the weather like in Phnom Penh in January?
- In January, Phnom Penh averages a daily high of 31.2°C and a low of 22.2°C, with about 20.4 mm of rain over roughly 2.2 rainy days.
- What is the air quality in Phnom Penh in January?
- Phnom Penh has a mean US Air Quality Index of about 71 in January.