May weather forecast
Weliweriya, Sri Lanka

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

Temperature

May brings a marginal elevation to a still tropical 30.6°C (87.1°F) from April's 31.8°C (89.2°F) in Weliweriya's average high-temperatures. Nighttime temperature in Weliweriya reflects an average dip to a warm 26.3°C (79.3°F) in May, subtly cooler than its daytime highs.

Heat index

In May, the average heat index is evaluated at a scorching 40°C (104°F). Implement additional preventive actions, heat cramps and heat exhaustion are potential hazards. Heatstroke could follow prolonged activity.
The metrics for the heat index are tailored for both shady environments and light winds. With direct sunlight, the heat index could increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', is the result of factoring in humidity to the air temperature, indicating perceived warmth. The individual's experience of temperature can be shaped by numerous aspects such as metabolic variations, physical exertion, and attire. When you're directly under the sun's rays, remember that the heat index may surge by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Kids generally face higher risks than adults as they sweat less. Along with their large skin surface compared to their small bodies and higher heat production due to their activities, their vulnerability is increased.
In high temperatures, perspiration kicks in, allowing the human body to cool down through the evaporation of sweat. An increase in relative humidity hinders the body's normal cooling function by reducing evaporation, thereby decreasing the rate of body cooling and enhancing the sense of warmth. As the body gains more heat than it can dissipate, there's a risk of increasing temperatures and resultant overheating.

Humidity

The average relative humidity in May is 81%.

Rainfall

In May, the rain falls for 28.8 days. Throughout May, 306mm (12.05") of precipitation is accumulated. In Weliweriya, during the entire year, the rain falls for 289.4 days and collects up to 2262mm (89.06") of precipitation.

Daylight

In May, the average length of the day is 12h and 26min.
On the first day of the month, sunrise is at 05:55 and sunset at 18:18. On the last day of May, in Weliweriya, sunrise is at 05:52 and sunset at 18:22 +0530.

Sunshine

The average sunshine in May in Weliweriya is 8.6h.

UV index

May, June, August and October, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for average individuals.
Note: The UV index of 6 during May leads to these advisories:
Prevent overexposure. Protection from the sun's harmful effects is needed. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. Boost your sun resistance with garments that are densely woven yet spacious.