May weather forecast
Pilapitiya, Sri Lanka

The last month of the spring, May, is also a hot month in Pilapitiya, Sri Lanka, with an average temperature fluctuating between 26.3°C (79.3°F) and 30.6°C (87.1°F).

Temperature

Pilapitiya, Sri Lanka, experiences a subtle adjustment in high-temperatures to a still tropical 30.6°C (87.1°F) with the onset of May, maintaining near parity with April's 31.8°C (89.2°F). Nighttime temperatures during May report a consistent average of 26.3°C (79.3°F).

Heat index

The heat index value during May is computed to be a scorching 40°C (104°F). Exercise special caution, heat exhaustion and heat cramps are probable. Prolonged activity may induce heatstroke.
Factoring in the heat index, values are geared towards shaded areas with light breezes. Direct sunshine exposure could raise heat index values by as much as 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', joins air temperature with relative humidity to produce a temperature perception for humans. The influence of weather can be personal, changing with an individual's body mass, height, and level of physical exertion. Direct exposure to sun rays can potentially augment the heat sensation, elevating the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Children usually face more risks than adults as their ability to sweat is less. Additionally, their larger skin surface in relation to their petite bodies and higher heat output due to their activities increases their vulnerability.
The innate cooling system of the human body revolves around perspiration, with the evaporation of sweat being central to this process. When relative humidity is at high levels, the evaporation rate lessens, causing the body to keep more heat than it would in less humid conditions. Exceeding the body's heat disposal threshold results in a rise in body temperature and potential thermal disorders.

Humidity

In Pilapitiya, the average relative humidity in May is 81%.

Rainfall

In Pilapitiya, in May, during 28.8 rainfall days, 306mm (12.05") of precipitation is typically 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 in Pilapitiya, Sri Lanka, is 12h and 26min.
On the first day of the month, sunrise is at 05:56 and sunset at 18:18. On the last day of May, in Pilapitiya, sunrise is at 05:53 and sunset at 18:23 +0530.

Sunshine

In May, the average sunshine in Pilapitiya is 8.6h.

UV index

The months with the lowest UV index in Pilapitiya are May, June, August and October, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for the average person.
Note: The maximum daily UV index, 6 in May, converts into the following recommendations:
Deflect overexposure. Sun protection is a necessity. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.