May weather forecast
Mirissa, Sri Lanka

Although May experiences a temperature plateau, there is a sharp upturn in rainfall. The consistent sea temperatures provide an exceptional ambiance for water-related activities. Sunlight hours per day wane slightly, implying shorter days. Despite maintaining the high UV index, more rainfall of 258mm (10.16") within 11 days is recorded compared to previous months.

Temperature

May ushers in an average high-temperature of a still tropical 30°C (86°F), aligning closely with the preceding month. An average low-temperature of 25°C (77°F) is witnessed throughout the month of May in Mirissa, a mere drop from the daytime peak.

Rainfall

In May, in Mirissa, the rain falls for 11 days. Throughout May, 258mm (10.16") of precipitation is accumulated. In Mirissa, during the entire year, the rain falls for 116 days and collects up to 2216mm (87.24") of precipitation.

Sea temperature

In Mirissa, in May, the average water temperature is 29°C (84.2°F).
Note: For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

Daylight

In May, the average length of the day is 12h and 23min.
On the first day of the month, sunrise is at 05:55 and sunset at 18:15. On the last day of May, sunrise is at 05:52 and sunset at 18:19 +0530.

Sunshine

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

UV index

The months with the highest UV index are January through October, with an average maximum UV index of 12. A UV Index reading of 11, and higher, represents an ultimate health vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: The maximum UV index of 12 during May translates into these guidelines:
Practice every precaution of necessity, unprotected skin and eyes might 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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Even if the day is cloudy, sunscreen with SPF of at least 30 should be applied generously and reapplied often, particularly after swimming or outdoor exercise. Be careful! The Sun's UV radiation is accentuated by reflecting off sand and water.