Mirissa
Sri Lanka
Long-term weather forecast
Long-term weather forecast

May weather forecast and climate
Mirissa, Sri Lanka

A row of palm trees with boats under, along Tropical Beach in Mirissa, Sri Lanka, with a sneak view of water approaching the beautiful brown sandy shore
A row of palm trees with boats under, along Tropical Beach in Mirissa, Sri Lanka, with a sneak view of water approaching the beautiful brown sandy shore
May, the last month of the spring, in Mirissa, is another hot month, with temperature in the range of an average high of 30°C (86°F) and an average low of 25°C (77°F).

Temperature

In Mirissa, the average high-temperature is essentially the same as in April - a still hot 30°C (86°F). The average low-temperature, in Mirissa, is 25°C (77°F).

Rainfall

In Mirissa, in May, during 11 rainfall days, 258mm (10.2") of precipitation is typically accumulated. Throughout the year, in Mirissa, there are 116 rainfall days, and 2216mm (87.2") of precipitation is accumulated.

Sea temperature

In Mirissa, the average seawater temperature is 29°C (84.2°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.

Daylight

In Mirissa, the average length of the day is 12.4h.

Sunshine

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

UV index

January through October, with an average maximum UV index of 12, are months with the highest UV index. A UV Index estimate of 11, and higher, represents an excessive health risk from unprotected exposure to the Sun's UV rays for ordinary individuals.
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. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Even on cloudy days, a sunscreen with a minimum 30 sun protection factor should be generously applied and frequently re-applied, including after every swim or outdoor exercise. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.

What is the temperature in May in Mirissa?

The average high-temperature, in May, in Mirissa, is 30°C (86°F), while the average low-temperature is 25°C (77°F).

How many days does it rain in May in Mirissa?

In Mirissa, in May, during 11 rainfall days, 258mm (10.2") of precipitation is typically accumulated.

How warm is the water in May in Mirissa?

In Mirissa, in May, the average water temperature is 29°C (84.2°F). 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.

How many hours of daylight does Mirissa have in May?

The average length of the day in May in Mirissa, Sri Lanka, is 12.4h.

What is the month with the least sunshine in Mirissa?

Months with the least sunshine in Mirissa are May through December, with an average of 6h of sunshine.

How many hours of sunshine does Mirissa have in May?

In Mirissa, the average sunshine in May is 6h.

When is the highest UV index in Mirissa?

Months with the highest UV index in Mirissa are January through October, with an average maximum UV index of 12.

What is the UV index intensity in May in Mirissa?

The average daily maximum UV index in May in Mirissa, Sri Lanka, is 12. A UV Index of 11, and more, symbolizes an ultimate hazard to health from unsafe exposure to the Sun's UV rays.
Average temperature in May - Mirissa, Sri Lanka
  • Average high temperature in May: 30°C

Warmest months (with the highest average high temperature) are March and April (31°C).
Months with the lowest average high temperature are August, September, October and December (29°C).

  • Average low temperature in May: 25°C

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

Average rainfall in May - Mirissa, Sri Lanka
  • Average rainfall in May: 258mm

The wettest month (with the highest rainfall) is October (305mm).
The driest month (with the lowest rainfall) is January (89mm).

Average rainfall days in May - Mirissa, Sri Lanka
  • Average rainfall days in May: 11 days

The month with the highest number of rainy days is November (14 days).
Months with the lowest number of rainy days are January and February (5 days).

Average sea temperature in May - Mirissa, Sri Lanka
  • Average sea temperature in May: 29°C

The best month for swimming (with the highest average sea temperature) is April (30°C).
Coldest months (with the lowest average sea temperature) are January, February, June, July, August, September, October and December (28°C).

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

The month with the longest days is June (Average daylight: 12.5h).
Months with shortest days are January and December (Average daylight: 11.8h).

  • Average sunshine in May: 6h

Months with most sunshine are February and March (Average sunshine: 8h).
Months with least sunshine are May, June, July, August, September, October, November and December (Average sunshine: 6).

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

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