May weather forecast
Trincomalee, Sri Lanka

The transition from April to May in Trincomalee brings subtle alterations in the weather conditions. Temperature variations are slight, still managing to uphold sunny days coupled with a generous share of rainfall. The sea remains warm, favoring sea activities. Nevertheless, the notable shift is the doubling of wind speed to 15.9km/h (9.9mph) from last month. Consequently, adventurers may anticipate a bit of thrill while navigating the waters.

Temperature

Trincomalee experiences an average high-temperature of a still tropical 34.2°C (93.6°F) in May, marking an insignificant shift from 34.9°C (94.8°F) in April. Trincomalee records a mean low-temperature of 24.5°C (76.1°F) in May.

Heat index

For May, the heat index is estimated at a life-threatening hot 49°C (120.2°F). On guard: Heat exhaustion and heat cramps are predicted. Heatstroke is a potential hazard with continuous physical effort.
Be aware that heat index ratings are designed for shaded locations and minor breezes. Direct sunlight might lead to a heat index increase by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is an amalgamation of air temperature and humidity to express the equivalent perceived temperature. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. With direct sunlight, be aware that it might enhance the heat sensation, raising the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. In general, younger individuals are at greater risk than adults because they tend to sweat less. Also, having a larger skin surface to body size ratio and greater heat production due to their active behavior contribute to this danger.
Perspiration, which is the evaporation of sweat, is a primary way the human body manages and dispels excessive warmth. In the presence of elevated relative humidity, the evaporation rate decreases. This reduction leads to increased body heat retention compared to conditions of dry air. When body heat isn't effectively managed, risks of dehydration and overheating amplify.

Humidity

In Trincomalee, the average relative humidity in May is 72%.

Rainfall

In Trincomalee, in May, it is raining for 17.4 days, with typically 83mm (3.27") of accumulated precipitation. Throughout the year, there are 196.8 rainfall days, and 943mm (37.13") of precipitation is accumulated.

Sea temperature

With an average sea temperature of 30.2°C (86.4°F), May is the month with the warmest seawater in Trincomalee.
Note: For swimming, other intense water activities, temperature above 30°C (86°F) is arguably unpleasant, as the water cooling effect is missing.

Daylight

In Trincomalee, the average length of the day in May is 12h and 31min.
On the first day of May in Trincomalee, sunrise is at 05:49 and sunset at 18:15. On the last day of the month, sunrise is at 05:45 and sunset at 18:20 +0530.

Sunshine

The average sunshine in May in Trincomalee, Sri Lanka, is 11.2h.

UV index

The months with the highest UV index are February through October, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for average individuals.
Note: A maximum high UV index of 7 in May translates into the following recommendations:
Fend off overexposure. Sun protection is vital. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Notice! The reflection of water and sand increases the UV radiation significantly.