May weather forecast and climate
Colombo, Sri Lanka

Statues on the Seema Malaka Temple in Colombo, Sri Lanka, overlooking the Beira Lake, and a yonder view of the tall buildings of Colombo
Statues on the Seema Malaka Temple in Colombo, Sri Lanka, overlooking the Beira Lake, and a yonder view of the tall buildings of Colombo

What is the temperature in May in Colombo?

The average high-temperature, in May, in Colombo, Sri Lanka, is 31.1°C (88°F), while the average low-temperature is 25.5°C (77.9°F).

How many days does it rain in May in Colombo?

In Colombo, Sri Lanka, in May, during 16 rainfall days, typically 392.4mm (15.4") of precipitation is accumulated.
Average temperature in May - Colombo, Sri Lanka
  • Average high temperature in May: 31.1°C

The warmest month (with the highest average high temperature) is April (31.8°C).
Months with the lowest average high temperature are July, August and October (30°C).

  • Average low temperature in May: 25.5°C

Months with the highest average low temperature are May and June (25.5°C).
The coldest month (with the lowest average low temperature) is January (22.3°C).

Average humidity in May - Colombo, Sri Lanka
  • Average humidity in May: 78%

The month with the highest relative humidity is June (79%).
Months with the lowest relative humidity are January and February (69%).

Average rainfall in May - Colombo, Sri Lanka
  • Average rainfall in May: 392.4mm

The wettest month (with the highest rainfall) is November (414.4mm).
The driest month (with the lowest rainfall) is January (58.2mm).

Average rainfall days in May - Colombo, Sri Lanka
  • Average rainfall days in May: 16 days

The month with the highest number of rainy days is October (17 days).
Months with the lowest number of rainy days are January and February (5 days).

Average sea temperature in May - Colombo, Sri Lanka
  • Average sea temperature in May: 29.3°C

The best month for swimming (with the highest average sea temperature) is April (29.6°C).
The coldest month (with the lowest average sea temperature) is August (27.2°C).

Average daylight in May / Average sunshine in May - Colombo, Sri Lanka
  • Average daylight in May: 12.4h

Months with the longest days are June and July (Average daylight: 12.5h).
The month with shortest days is December (Average daylight: 11.7h).

  • Average sunshine in May: 6.5h

The month with most sunshine is March (Average sunshine: 8.9h).
The month with least sunshine is September (Average sunshine: 6.3h).

Average UV index in May - Colombo, Sri Lanka
  • Average UV index in May: 12

Months with the highest UV index are February, March, April, May, June, July, August, September and October (UV index 12).
Months with the lowest UV index are January, November and December (UV index 11).

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