Unawatuna weather in September 2025

Expect daytime maximum temperatures of 84°F in Unawatuna, Sri Lanka in September and high heat and humidity based on long-term weather averages. There are 6 hours of sunshine per day on average with 12 days with some rainfall and typically 9.8 inches of rainfall in the month.

  • 84°F maximum daytime temperature in September in Unawatuna84
    84°F max day temperature
  • 6 hours of sunshine per day
  • 12 days with some rainfall in September in Unawatuna12
    12 days with some rainfall
  • 75°F minimum night-time temperature in September in Unawatuna75
    75°F min night temperature
  • 12 hours of daylight per day in September in Unawatuna12
    12 hours of daylight per day
  • High heat & humidity in September in UnawatunaH
    High heat & humidity
  • 9.8 inches monthly rainfall in September in Unawatuna9.8
    9.8 inches of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in September in Unawatuna11
    11+ (Extreme) UV index
  • 82°F sea temperature in September in Unawatuna82
    82°F sea temperature

More about Unawatuna

Unawatuna by month

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The September 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)  |  Imperial (°F)

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More about Sri Lanka

How hot is it in Unawatuna in September?

Daytime temperatures usually reach 84°F in Unawatuna in September with high heat and humidity, falling to 75°F at night.

How sunny is it in Unawatuna in September?

There are normally 6 hours of bright sunshine each day in Unawatuna in September - that's 49% of daylight hours.

How warm is the sea around Unawatuna in September?

The average sea temperature around Unawatuna in September is 82°F.

Does it rain in Unawatuna in September?

There are usually 12 days with some rain in Unawatuna in September and the average monthly rainfall is 9.8 inches.

Unawatuna September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:02 18:16
Monday, 15th September 2025 06:00 18:09
Tuesday, 30th September 2025 05:57 18:01

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