Unawatuna weather in December 2025

Expect daytime maximum temperatures of 29°C in Unawatuna, Sri Lanka in December and high heat and humidity based on long-term weather averages. There are 7 hours of sunshine per day on average with 10 days with some rainfall and typically 181 mm of rainfall in the month.

  • 29°C maximum daytime temperature in December in Unawatuna29
    29°C max day temperature
  • 7 hours of sunshine per day
  • 10 days with some rainfall in December in Unawatuna10
    10 days with some rainfall
  • 22°C minimum night-time temperature in December in Unawatuna22
    22°C min night temperature
  • 12 hours of daylight per day in December in Unawatuna12
    12 hours of daylight per day
  • High heat & humidity in December in UnawatunaH
    High heat & humidity
  • 181 mm monthly rainfall in December in Unawatuna181
    181 mm of monthly rainfall
  • UV (maximum) index 11 (Extreme) in December in Unawatuna11
    11 (Extreme) UV index
  • 28°C sea temperature in December in Unawatuna28
    28°C sea temperature

More about Unawatuna

Unawatuna by month

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The December weather guide for Sri Lanka (Unawatuna) 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 Unawatuna in December?

Daytime temperatures usually reach 29°C in Unawatuna in December with high heat and humidity, falling to 22°C at night.

How sunny is it in Unawatuna in December?

There are normally 7 hours of bright sunshine each day in Unawatuna in December - that's 55% of daylight hours.

How warm is the sea around Unawatuna in December?

The average sea temperature around Unawatuna in December is 28°C.

Does it rain in Unawatuna in December?

There are usually 10 days with some rain in Unawatuna in December and the average monthly rainfall is 181mm.

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

On average less than 1 day in December in Unawatuna is likely to be affected by the passage of one or more tropical storms.

Unawatuna December sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st December 2025 06:04 17:52
Tuesday, 16th December 2025 06:11 17:58
Wednesday, 31st December 2025 06:18 18:05

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