Sihanoukville weather in December
December in Sihanoukville: hot, a little rain, with clean air — an excellent time to visit.
#3 of 12 months in Sihanoukville · #75 of 897 destinations to visit in December · comfort 89/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Sihanoukville in December
No notes yet. Open Sihanoukville on the map to add the first one.
Sihanoukville climate normals — December
| Daytime high | 30°C / 85°F | 🥵 hot |
|---|---|---|
| Nighttime low | 25°C / 76°F | |
| Rainfall | 64 mm / 2.5 in | 🌦 some rain |
| Rainy days | 10 days | |
| Humidity | 73% | 💧 humid |
| Dew point | 22°C / 71°F | |
| Sunshine | 10 h/day | |
| Daylight | 11.5 h | |
| Wind | 12 km/h / 7 mph | |
| Air quality (US AQI) | 41 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Sihanoukville?
Loading map…
Sihanoukville in December — FAQ
- Is December a good time to visit Sihanoukville?
- December in Sihanoukville: hot, a little rain, with clean air — an excellent time to visit. It ranks #3 of 12 months for Sihanoukville on SeasonMap's comfort score (89/100).
- What is the weather like in Sihanoukville in December?
- In December, Sihanoukville averages a daily high of 29.5°C and a low of 24.6°C, with about 63.6 mm of rain over roughly 10 rainy days.
- What is the air quality in Sihanoukville in December?
- Sihanoukville has a mean US Air Quality Index of about 41 in December.