Trincomalee weather in December 2025

Expect daytime maximum temperatures of 28°C in Trincomalee, Sri Lanka in December based on long-term weather averages. There are 6 hours of sunshine per day on average with 16 days with some rainfall and typically 367 mm of rainfall in the month.

  • 28°C maximum daytime temperature in December in Trincomalee28
    28°C max day temperature
  • 6 hours of sunshine per day
  • 16 days with some rainfall in December in Trincomalee16
    16 days with some rainfall
  • 24°C minimum night-time temperature in December in Trincomalee24
    24°C min night temperature
  • 12 hours of daylight per day in December in Trincomalee12
    12 hours of daylight per day
  • Moderate heat & humidity in December in TrincomaleeM
    Moderate heat & humidity
  • 367 mm monthly rainfall in December in Trincomalee367
    367 mm of monthly rainfall
  • UV (maximum) index 10 (Very High) in December in Trincomalee10
    10 (Very High) UV index
  • 27°C sea temperature in December in Trincomalee27
    27°C sea temperature

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Trincomalee by month

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The December weather guide for Sri Lanka (Trincomalee) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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More about Sri Lanka

How hot is it in Trincomalee in December?

Daytime temperatures usually reach 28°C in Trincomalee in December with moderate heat and humidity, falling to 24°C at night.

How sunny is it in Trincomalee in December?

There are normally 6 hours of bright sunshine each day in Trincomalee in December - that's 48% of daylight hours.

How warm is the sea around Trincomalee in December?

The average sea temperature around Trincomalee in December is 27°C.

Does it rain in Trincomalee in December?

There are usually 16 days with some rain in Trincomalee in December and the average monthly rainfall is 367mm.

What is the chance of a cyclone in Trincomalee in December?

On average 1.2 days in December in Trincomalee are likely to be affected by the passage of one or more tropical storms.

Trincomalee December sunrise & sunset times

Browse the sunrise and sunset times for Trincomalee in December 2025. Select a month to view Trincomalee sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st December 2025 06:04 17:44
Tuesday, 16th December 2025 06:12 17:50
Wednesday, 31st December 2025 06:19 17:57

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