Kalutara weather in September 2025

Expect 30°C daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in Kalutara in September. Check more long-term weather averages for Kalutara in September before you book your next holiday to Sri Lanka in 2025/2026.

  • 30°C maximum daytime temperature in September in Kalutara30
    30°C max day temperature
  • 6 hours of sunshine per day
  • 13 days with some rainfall in September in Kalutara13
    13 days with some rainfall
  • 25°C minimum night-time temperature in September in Kalutara25
    25°C min night temperature
  • 12 hours of daylight per day in September in Kalutara12
    12 hours of daylight per day
  • High heat & humidity in September in KalutaraH
    High heat & humidity
  • 270 mm monthly rainfall in September in Kalutara270
    270 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in September in Kalutara11
    11+ (Extreme) UV index
  • 28°C sea temperature in September in Kalutara28
    28°C sea temperature

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The September weather guide for Sri Lanka (Kalutara) 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 Kalutara in September?

Daytime temperatures usually reach 30°C in Kalutara in September with high heat and humidity, falling to 25°C at night.

How sunny is it in Kalutara in September?

There are normally 6 hours of bright sunshine each day in Kalutara in September - that's 50% of daylight hours.

How warm is the sea around Kalutara in September?

The average sea temperature around Kalutara in September is 28°C.

Does it rain in Kalutara in September?

There are usually 13 days with some rain in Kalutara in September and the average monthly rainfall is 270mm.

Kalutara September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:03 18:17
Monday, 15th September 2025 06:01 18:10
Tuesday, 30th September 2025 05:58 18:02

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