May weather forecast
Nilaveli, Sri Lanka

May, the last month of the spring in Nilaveli, is also a hot month, with an average temperature fluctuating between 24.5°C (76.1°F) and 34.2°C (93.6°F).

Temperature

The average high-temperature during May registers at a still tropical 34.2°C (93.6°F), maintaining a close resemblance to the previous month. May brings with it a nighttime average temperature of 24.5°C (76.1°F).

Heat index

The heat index value for May is appraised at a blazing hot 49°C (120.2°F). Stay on guard: Heat exhaustion and heat cramps are predicted. Ongoing effort can cause heatstroke.
The metrics for the heat index are tailored for both shady environments and light winds. If exposed to direct sunlight, the heat index could climb by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is the outcome of merging air's temperature and its humidity metrics. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. Realize that direct exposure to sunlight can augment the felt heat, leading to a potential increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Youngsters generally face more threats than adults given their lesser ability to sweat. Coupled with their larger skin surface relative to their small bodies and higher heat production due to their activities, they are more endangered.
The body's inherent cooling system operates through perspiration, wherein evaporating sweat offsets excessive heat. Under high air temperature and high humidity (high heat index) conditions, the body's ability to perspire is compromised, increasing the sensation of heat. Heat-related complications, like dehydration, can manifest if the body's heat gain exceeds its dissipation capacity.

Humidity

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

Rainfall

In Nilaveli, during May, the rain falls for 17.4 days and regularly aggregates up to 83mm (3.27") of precipitation. Throughout the year, there are 196.8 rainfall days, and 943mm (37.13") of precipitation is accumulated.

Daylight

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

Sunshine

In Nilaveli, the average sunshine in May is 11.2h.

UV index

The months with the highest UV index in Nilaveli, Sri Lanka, are February through October, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: The daily high UV index of 7 during May translates into the following recommendations:
Prevent overexposure. Protection from the sun's harmful effects is needed. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.