Trincomalee Weather in December
What's the weather like in Trincomalee (Eastern Province) in December 2025?
The climate in Trincomalee during December can be summarized as hot, humid and very wet.
December is in the winter in Trincomalee and is typically the 2nd coldest month of the year. Daytime maximum temperatures average around a steamy 28°C (83°F), whilst at night 24°C (76°F) is normal.
| Daytime temperature | 28.2°C 82.7°F |
|---|---|
| Nightly temperature | 24.3°C 75.7°F |
| Average temperature | 26.2°C 79.2°F |
| Daily sunshine | 6 hrs |
| Avg rainfall | 367 mm 14.4 ins |
| Rainy days | 16 days |
| Sea temperature | 27.8°C 82°F |
| Humidity | 81% |
| Windspeed | 15.5kph 10 mph |
On average December is the wettest month of the year in Trincomalee with around 367mm 14.4 inches of rain making it a very wet time to visit. This rainfall is typically spread over 16 days, although this may vary considerably.
On the flip side this corresponds to an average of 6 hours of sunshine per day.
December temperatures in Trincomalee
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 Trincomalee in December 2025.
Other monthly averages
Best places to visit in December
Trincomalee weather stats
| Hottest month: | June | 34.6°C 94.3°F |
|---|---|---|
| Driest month: | June | 25mm 1ins |
| Sunniest month: | March | 9.2hrs |
| Coldest month: | January | 27.8°C 82°F |
| Wettest month: | December | 367mm 14.4ins |
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