December · Cambodia
Best time to visit Sihanoukville in December Weather, crowds & prices
Weather in Sihanoukville in December
Average temperature 26°C, 46 mm of rain, about 20 days with 6+ hours of sunshine and 82% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
December score
9.0/10
Ranked #4 of 12 months
- Avg temp
- 26°C
- Rainfall
- 46 mm
- Humidity
- 82%
- Days with 6h+ sun
- 20
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$$ · Peak Season Rates ($$$)
December in Sihanoukville scores 9.0/10 for beach and coastal travel - an above-average month (#4 of 12). Expect around 26°C, 46 mm of rain, and roughly 20 days with 6+ hours of sunshine this month.
Sihanoukville is Cambodia's beach and ferry hub for the southern islands.
December ranks 4th of 12 for Sihanoukville — one of the best windows
December averages 26°C (80°F) and humidity near 82%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
Rainfall runs 46 mm, so plan one flexible day in three; you still get about 20 days with 6+ hours of sunshine and 11.4 hours of daylight.
A 9/10 puts this among the year's best months in Sihanoukville (4th of 12); only February scores higher, at 9.8/10.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a packable rain layer.
Plan for peak pricing, with crowds are moderate.
Frequently asked
- What is the weather like in Sihanoukville in December?
- In December, Sihanoukville averages 26°C, 46 mm of rain, and about 20 days with 6+ hours of sunshine. Its climate-comfort score is 9.0/10.
- Is December a good time to visit Sihanoukville?
- December earns a 9.0/10 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 December?
- Expect about 46 mm of rain in December. Average humidity is 82% and there are about 20 days with 6+ hours of sunshine.
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