Colombo weather in May 2025

Expect daytime maximum temperatures of 31°C in Colombo 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 Colombo31
    31°C max day temperature
  • 6 hours of sunshine per day
  • 14 days with some rainfall in May in Colombo14
    14 days with some rainfall
  • 25°C minimum night-time temperature in May in Colombo25
    25°C min night temperature
  • 12 hours of daylight per day in May in Colombo12
    12 hours of daylight per day
  • Very high heat & humidity in May in ColomboVH
    Very High heat & humidity
  • 382 mm monthly rainfall in May in Colombo382
    382 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in May in Colombo11
    11+ (Extreme) UV index
  • 29°C sea temperature in May in Colombo29
    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.

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

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How hot is it in Colombo in May?

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

How sunny is it in Colombo in May?

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

How warm is the sea around Colombo in May?

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

Does it rain in Colombo in May?

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

Colombo May sunrise & sunset times

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

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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