Sri Lanka weather in May 2025

Expect daytime maximum temperatures of 31°C in 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 14 days with some rainfall and typically 382 mm of rainfall in the month.

  • 31°C maximum daytime temperature in May in Sri Lanka (Colombo)31
    31°C max day temperature
  • 6 hours of sunshine per day
  • 14 days with some rainfall in May in Sri Lanka (Colombo)14
    14 days with some rainfall
  • 25°C minimum night-time temperature in May in Sri Lanka (Colombo)25
    25°C min night temperature
  • 12 hours of daylight per day in May in Sri Lanka (Colombo)12
    12 hours of daylight per day
  • Very high heat & humidity in May in Sri Lanka (Colombo)VH
    Very High heat & humidity
  • 382 mm monthly rainfall in May in Sri Lanka (Colombo)382
    382 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in May in Sri Lanka (Colombo)11
    11+ (Extreme) UV index
  • 29°C sea temperature in May in Sri Lanka (Colombo)29
    29°C sea temperature

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The May weather guide for Sri Lanka (Colombo) 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.

Top Sri Lanka destinations

Below are average maximum temperatures at popular countries, regions and places in Sri Lanka in May. Select a holiday destination to see more weather parameters.

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Metric (°C / mm)  |  Imperial (°F / inches)

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More about Sri Lanka

How hot is it in Sri Lanka in May?

Daytime temperatures usually reach 31°C in Colombo, Sri Lanka in May with very high heat and humidity, falling to 25°C at night.

How sunny is it in Sri Lanka in May?

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

How warm is the sea around Sri Lanka in May?

The average sea temperature around Colombo, Sri Lanka in May is 29°C.

Does it rain in Sri Lanka in May?

There are usually 14 days with some rain in Colombo, Sri Lanka in May and the average monthly rainfall is 382mm.

Sri Lanka May sunrise & sunset times

Browse the sunrise and sunset times for Sri Lanka in May 2025. Select a month to view Sri Lanka sunrise and sunset times for the next 12 months. The Sri Lanka sunrise and sunset times shown below are for Colombo.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st May 2025 05:57 18:19
Friday, 16th May 2025 05:54 18:20
Saturday, 31st May 2025 05:53 18:23

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