Kalutara weather in May 2026

Expect daytime maximum temperatures of 88°F in Kalutara, Sri Lanka in May and very high heat and humidity based on long-term weather averages. There are 6 hours of sunshine per day on average with 13 days with some rainfall and typically 15.3 inches of rainfall in the month.

  • 88°F maximum daytime temperature in May in Kalutara88
    88°F max day temperature
  • 6 hours of sunshine per day
  • 13 days with some rainfall in May in Kalutara13
    13 days with some rainfall
  • 77°F minimum night-time temperature in May in Kalutara77
    77°F min night temperature
  • 12 hours of daylight per day in May in Kalutara12
    12 hours of daylight per day
  • Very high heat & humidity in May in KalutaraVH
    Very High heat & humidity
  • 15.3 inches monthly rainfall in May in Kalutara15.3
    15.3 inches of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in May in Kalutara11
    11+ (Extreme) UV index
  • 84°F sea temperature in May in Kalutara84
    84°F sea temperature

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The May 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)  |  Imperial (°F)

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More about Sri Lanka

How hot is it in Kalutara in May?

Daytime temperatures usually reach 88°F in Kalutara in May with very high heat and humidity, falling to 77°F at night.

How sunny is it in Kalutara in May?

There are normally 6 hours of bright sunshine each day in Kalutara in May - that's 51% of daylight hours.

How warm is the sea around Kalutara in May?

The average sea temperature around Kalutara in May is 84°F.

Does it rain in Kalutara in May?

There are usually 13 days with some rain in Kalutara in May and the average monthly rainfall is 15.3 inches.

Kalutara May sunrise & sunset times

Browse the sunrise and sunset times for Kalutara in May 2026. Select a month to view Kalutara sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st May 2026 05:57 18:18
Saturday, 16th May 2026 05:54 18:19
Sunday, 31st May 2026 05:54 18:22

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