Sihanoukville Weather in December
What's the weather like in Sihanoukville (Preah Sihanouk) in December 2025?
The climate in Sihanoukville during December can be summarized as hot, humid and a little damp.
December is in the winter in Sihanoukville and is typically the 2nd coldest month of the year. Daytime maximum temperatures average around a steamy 30°C (86°F), whilst at night 22°C (72°F) is normal.
| Daytime temperature | 30.1°C 86.1°F |
|---|---|
| Nightly temperature | 22°C 71.5°F |
| Average temperature | 26°C 78.8°F |
| Daily sunshine | 7.8 hrs |
| Avg rainfall | 84 mm 3.3 ins |
| Rainy days | 8 days |
| Sea temperature | 28.2°C 82.8°F |
| Humidity | 73% |
| Windspeed | 9kph 6 mph |
On average December is the 3rd driest month of the year in Sihanoukville with around 84mm 3.3 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 8 days, although this may vary considerably.
On the flip side this corresponds to an average of 7.8 hours of sunshine per day.
December temperatures in Sihanoukville
December rainfall
December hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Sihanoukville in December 2025.
Other monthly averages
Best places to visit in December
Sihanoukville weather stats
| Hottest month: | April | 32.9°C 91.2°F |
|---|---|---|
| Driest month: | January | 39mm 1.5ins |
| Sunniest month: | February | 8.4hrs |
| Coldest month: | January | 30.2°C 86.4°F |
| Wettest month: | August | 516mm 20.3ins |
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