January · Cambodia
Best time to visit Sihanoukville in January Weather, crowds & prices
Weather in Sihanoukville in January
Average temperature 27°C, 19 mm of rain, about 21 days with 6+ hours of sunshine and 77% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
January score
9.6/10
Ranked #2 of 12 months
- Avg temp
- 27°C
- Rainfall
- 19 mm
- Humidity
- 77%
- Days with 6h+ sun
- 21
- Crowd Density
- Peak Tourist Rush
- Average Expenses
- $$$ · Peak Season Rates ($$$)
January in Sihanoukville scores 9.6/10 for beach and coastal travel - one of the top 12-month picks (#2). Expect around 27°C, 19 mm of rain, and roughly 21 days with 6+ hours of sunshine this month.
Sihanoukville is Cambodia's beach and ferry hub for the southern islands.
January in Sihanoukville — one of the year's strongest windows (2nd)
Days in January average 27°C (80°F) and humidity near 77% — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.
With around 19 mm of rain, any showers tend to pass through rather than settle in; about 21 days with 6+ hours of sunshine and 11.4 hours of daylight fill the rest.
On our climate-comfort scale this is one of the strongest months of the year for Sihanoukville at 9.6/10 (2nd of 12), just behind February at 9.8/10.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary.
Expect peak pricing, and this is one of the busiest months here. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Frequently asked
- What is the weather like in Sihanoukville in January?
- In January, Sihanoukville averages 27°C, 19 mm of rain, and about 21 days with 6+ hours of sunshine. Its climate-comfort score is 9.6/10.
- Is January a good time to visit Sihanoukville?
- January earns a 9.6/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Sihanoukville in January?
- Expect about 19 mm of rain in January. Average humidity is 77% and there are about 21 days with 6+ hours of sunshine.
Curated in Sihanoukville
Tickets & experiences
Things to do in Sihanoukville
Sihanoukville, Cambodia. Live activities and tours from GetYourGuide, matched to this destination.