Trincomalee weather in September 2025

Expect 93°F daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Trincomalee in September. Check more long-term weather averages for Trincomalee in September before you book your next holiday to Sri Lanka in 2025/2026.

  • 93°F maximum daytime temperature in September in Trincomalee93
    93°F max day temperature
  • 7 hours of sunshine per day
  • 6 days with some rainfall in September in Trincomalee6
    6 days with some rainfall
  • 77°F minimum night-time temperature in September in Trincomalee77
    77°F min night temperature
  • 12 hours of daylight per day in September in Trincomalee12
    12 hours of daylight per day
  • Very high heat & humidity in September in TrincomaleeVH
    Very High heat & humidity
  • 3.8 inches monthly rainfall in September in Trincomalee3.8
    3.8 inches of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in September in Trincomalee11
    11+ (Extreme) UV index
  • 84°F sea temperature in September in Trincomalee84
    84°F sea temperature

More about Trincomalee

Trincomalee by month

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The September 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)  |  Imperial (°F)

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More about Sri Lanka

How hot is it in Trincomalee in September?

Daytime temperatures usually reach 93°F in Trincomalee in September with very high heat and humidity, falling to 77°F at night.

How sunny is it in Trincomalee in September?

There are normally 7 hours of bright sunshine each day in Trincomalee in September - that's 56% of daylight hours.

How warm is the sea around Trincomalee in September?

The average sea temperature around Trincomalee in September is 84°F.

Does it rain in Trincomalee in September?

There are usually 6 days with some rain in Trincomalee in September and the average monthly rainfall is 3.8 inches.

Trincomalee September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:57 18:13
Monday, 15th September 2025 05:55 18:05
Tuesday, 30th September 2025 05:53 17:57

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