May weather forecast
Hiyarapitiya, Sri Lanka

The last month of the spring, May, is another tropical month in Hiyarapitiya, Sri Lanka, with an average temperature varying between 21.8°C (71.2°F) and 30.1°C (86.2°F).

Temperature

The transition from April to May sees average high-temperatures adjusting to a still tropical 30.1°C (86.2°F), from a not significantly different 31.2°C (88.2°F). May in Hiyarapitiya, Sri Lanka, is noted for a mean low-temperature of 21.8°C (71.2°F).

Heat index

For May, the heat index is estimated at a fiery hot 38°C (100.4°F). Implement enhanced safety actions, heat cramps and heat exhaustion could occur. Sustained activity might result in heatstroke.
When considering the heat index, it's pivotal to note it is for shade and mild wind conditions. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'real feel' or 'apparent temperature', combines both the air temperature and the humidity level to give a perceived human temperature. The individual's impression of temperature can be affected by numerous factors such as metabolic variations, physical exertion, and attire. When exposed to direct sunlight, it's possible for the heat index to increase by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Younglings are generally more in peril than adults due to their reduced perspiration. Coupled with a larger skin surface relative to their tiny bodies and greater heat production because of their activity, they become more at risk.
Perspiring is the body's way of cooling down, particularly by allowing sweat to evaporate and take the heat with it. Under high air temperature coupled with high humidity (high heat index), the body's perspiration is reduced, intensifying the sensation of heat. Temperature imbalances caused by excessive heat retention can trigger heat-related maladies.

Humidity

In May, the average relative humidity is 80%.

Rainfall

In May, the rain falls for 28.6 days. Throughout May, 163mm (6.42") of precipitation is accumulated. Throughout the year, in Hiyarapitiya, there are 278.9 rainfall days, and 1477mm (58.15") of precipitation is accumulated.

Daylight

The average length of the day in May is 12h and 27min.
On the first day of May in Hiyarapitiya, sunrise is at 05:53 and sunset at 18:16. On the last day of the month, sunrise is at 05:50 and sunset at 18:20 +0530.

Sunshine

The average sunshine in May in Hiyarapitiya is 10.4h.

UV index

The months with the highest UV index are January through September, November and December, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: A maximum high UV index of 6 in May translates into the following recommendations:
Employ safeguards and advocate sun safety protocols. Shielding against skin and eye damage is crucial. 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. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.