SeasonMapKoh Rong weather in January
Cambodia
January in Koh Rong: sweltering, a little rain, with muggy air — fine if you can take 35°C afternoons.
#2 of 12 months in Koh Rong · #140 of 1383 destinations to visit in January · comfort 90/100 (tier S)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Koh Rong in January
No notes yet. Open Koh Rong on the map to add the first one.
Koh Rong climate normals — January
| Daytime high | 30°C / 85°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 25°C / 77°F | |
| Feels like (high) | 35°C / 95°F | |
| Sea temperature | 28°C / 83°F | ♨️ bath-warm |
| Rainfall | 52 mm / 2.1 in | 🌦 some rain |
| Rainy days | 10 days | |
| Humidity | 78% | 💦 very humid |
| Dew point | 23°C / 73°F | |
| Sunshine | 10.3 h/day | |
| Daylight | 11.6 h | |
| Wind | 14 km/h / 8 mph | |
| Air quality (US AQI) | 60 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Koh Rong in January
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
BusyChinese New Year, school holidays in 6 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Koh Rong's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Best weatherKoh Rong's weather peaks December–February.
January includes Bioluminescent plankton.
Best weatherFair weatherToughest weather
What's on in Koh Rong in January
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Holiday
Chinese New Year
20 Jan – 25 Feb · usuallyLunar New YearCrowdedBook earlyThe island is a new-year destination for Chinese families and the bungalows at Koh Touch and Sok San are booked out well ahead. Turning up on the ferry and finding a bed does not work that fortnight. Source ↗
- Nature
Bioluminescent plankton
1 Nov – 31 Mar · usuallyBioluminescenceCalm dry-season water and a moonless night are what it takes; walk to a beach the resorts have stopped lighting and the water lights up where you move it. Nothing to see on a bright moon.
Nearby, and something's on
Within 300 km of Koh Rong — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Koh Rong?
Koh Rong in January — FAQ
- Is January a good time to visit Koh Rong?
- January in Koh Rong: sweltering, a little rain, with muggy air — fine if you can take 35°C afternoons. It ranks #2 of 12 months for Koh Rong on SeasonMap's comfort score (90/100).
- What is the weather like in Koh Rong in January?
- In January, Koh Rong averages a daily high of 29.7°C and a low of 25°C, with about 52.2 mm of rain over roughly 9.6 rainy days.
- What is the air quality in Koh Rong in January?
- Koh Rong has a mean US Air Quality Index of about 60 in January.
Other months in Koh Rong
Compare Koh Rong in January
Warmer or cooler than Koh Rong in January
Similar destinations in Southeast Asia — January
Within 300 km: Phu Quoc's Dry season around 15 Nov – 30 Apr, and Phnom Penh's Dry season around 15 Nov – 30 Apr.