Kalutara
Sri Lanka
Long-term weather forecast
Long-term weather forecast

May weather forecast and climate
Kalutara, Sri Lanka

May, the last month of the spring, in Kalutara, is another tropical month, with average temperature varying between 31°C (87.8°F) and 25°C (77°F).

Temperature

In May, the average high-temperature is relatively the same as in April - a still hot 31°C (87.8°F). In May, the average low-temperature is 25°C (77°F).

Rainfall

The month with the most rainfall is May when the rain falls for 13 days and typically aggregates up to 388mm (15.3") of precipitation.

Sea temperature

In May, the average sea temperature is 29.3°C (84.7°F).
Note: Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

Daylight

The average length of the day in May is 12.4h.

Sunshine

Months with the least sunshine are May through October, with an average of 6h of sunshine.

UV index

Months with the highest UV index in Kalutara are February through October, with an average maximum UV index of 12. A UV Index reading of 11, and higher, represents an ultimate health vulnerability from the exposure to the Sun's UV rays for ordinary individuals.
Note: In May, the average maximum UV index of 12 translate into the following recommendations:
Take all required precautions, as unprotected skin and eyes can burn in minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. A broad-spectrum sunscreen of SPF 30+ should be liberally applied and re-applied every two hours, and immediately after an outdoor workout or a swim. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.

What is the temperature in May in Kalutara?

In Kalutara, Sri Lanka, in May, the average high-temperature is 31°C (87.8°F), and the average low-temperature is 25°C (77°F).

How many days does it rain in May in Kalutara?

In Kalutara, Sri Lanka, in May, it is raining for 13 days, with typically 388mm (15.3") of accumulated precipitation.

What is the wettest month in Kalutara?

The month with the most rainfall in Kalutara is May when the rain falls for 13 days and typically aggregates up to 388mm (15.3") of precipitation.

What is the water temperature in May in Kalutara?

In Kalutara, in May, the average water temperature is 29.3°C (84.7°F). For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.

How many hours of daylight does Kalutara have in May?

The average length of the day in May is 12.4h.

What is the month with the least sunshine in Kalutara?

May through October, with an average of 6h of sunshine, are months with the least sunshine in Kalutara.

How many hours of sunshine does Kalutara have in May?

In Kalutara, Sri Lanka, the average sunshine in May is 6h.

What are the months with the highest UV index in Kalutara?

Months with the highest UV index in Kalutara, Sri Lanka, are February through October, with an average maximum UV index of 12.

How high is the UV index in May in Kalutara?

The average daily maximum UV index in May in Kalutara, Sri Lanka, is 12. A UV Index estimate of 11, and higher, represents an excessive health risk from unprotected exposure to the UV radiation.
Average temperature in May - Kalutara, Sri Lanka
  • Average high temperature in May: 31°C

The warmest month (with the highest average high temperature) is April (32°C).
Months with the lowest average high temperature are June, July, August, September, October, November and December (30°C).

  • Average low temperature in May: 25°C

Months with the highest average low temperature are May, June, July, August and September (25°C).
The coldest month (with the lowest average low temperature) is January (22°C).

Average rainfall in May - Kalutara, Sri Lanka
  • Average rainfall in May: 388mm

The wettest month (with the highest rainfall) is May (388mm).
The driest month (with the lowest rainfall) is January (73mm).

Average rainfall days in May - Kalutara, Sri Lanka
  • Average rainfall days in May: 13 days

The month with the highest number of rainy days is October (15 days).
Months with the lowest number of rainy days are January and February (5 days).

Average sea temperature in May - Kalutara, 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 - Kalutara, 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: 6h

The month with most sunshine is March (Average sunshine: 9h).
Months with least sunshine are May, June, July, August, September and October (Average sunshine: 6).

Average UV index in May - Kalutara, 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).