May weather forecast
Slave Island, Sri Lanka

May, the last month of the spring in Slave Island, is another tropical month, with an average temperature ranging between max 30.6°C (87.1°F) and min 26.3°C (79.3°F).

Temperature

May denotes a minimal variation in the average high-temperature to a still hot 30.6°C (87.1°F) from April's 31.8°C (89.2°F). Recording a slight decline in temperature during the nights, Slave Island's May temperatures average at a warm 26.3°C (79.3°F).

Heat index

May's mean heat index is appraised at a scorching 40°C (104°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
The standards for the heat index are set for locations in shade and under light breezes. Exposing to direct sunshine may enhance heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', combines both the air temperature and the humidity level to give a perceived human temperature. The influence of weather is personal, differing among individuals based on variations in body mass, stature, and the degree of physical exertion. Direct sun rays can make one feel hotter, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Young people are generally more susceptible than adults because they perspire less. Furthermore, their proportionally larger skin surface to their petite bodies and the increased heat output from their actions add to the risk.
To achieve cooling, the human body employs perspiration, relying on the subsequent evaporation of sweat. When relative humidity is on the rise, it curtails evaporation, thereby reducing the heat elimination from the body and causing the feeling of being excessively hot. When the heat gained surpasses the body's cooling capacity, temperatures rise, signaling potential health concerns.

Humidity

In May, the average relative humidity in Slave Island, Sri Lanka, is 81%.

Rainfall

In May, the rain falls for 28.8 days. Throughout May, 306mm (12.05") of precipitation is accumulated. Throughout the year, there are 289.4 rainfall days, and 2262mm (89.06") of precipitation is accumulated.

Daylight

The average length of the day in May is 12h and 26min.
On the first day of May, sunrise is at 05:56 and sunset at 18:18. On the last day of the month, sunrise is at 05:53 and sunset at 18:23 +0530.

Sunshine

In Slave Island, the average sunshine in May is 8.6h.

UV index

The months with the lowest UV index in Slave Island are May, June, August and October, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: The maximum daily UV index of 6 during May translates into the following directions:
Embrace precautions and observe sun safety norms. Evasion of sunburn is a necessity. Remember that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. Make an effort to avoid direct sun exposure during these hours. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.