May weather forecast
Dematagahapelessa, Sri Lanka

The last month of the spring, May, is also a hot month in Dematagahapelessa, Sri Lanka, with an average temperature ranging between max 31.8°C (89.2°F) and min 23°C (73.4°F).

Temperature

May observes an average high-temperature of a still hot 31.8°C (89.2°F), marking an insignificant difference from April's 32.9°C (91.2°F). In Dematagahapelessa, the expected average low-temperature for May is a warm 23°C (73.4°F).

Heat index

The heat index value during May is calculated to be a scorching 42°C (107.6°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Heat index determinations are made taking into account the shade and light air movements. Exposure to the direct sun could elevate the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is a measure of how hot it feels when the actual air humidity is factored in. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. With the sun shining directly, it's crucial to understand that it can increase the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Young individuals are generally in more danger than adults due to their lower capacity to sweat. Moreover, their large skin surface in relation to their small bodies and the increased heat generation from their activities makes them more vulnerable.
When temperatures rise, the human body turns to perspiration, using the cooling power of evaporating sweat. With higher relative humidity, the rate of evaporation is reduced, resulting in increased heat retention in the body compared to drier air. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

In May, the average relative humidity is 77%.

Rainfall

In Dematagahapelessa, during May, the rain falls for 21.6 days and regularly aggregates up to 117mm (4.61") of precipitation. In Dematagahapelessa, during the entire year, the rain falls for 217.7 days and collects up to 1165mm (45.87") of precipitation.

Daylight

In Dematagahapelessa, the average length of the day in May is 12h and 28min.
On the first day of the month, sunrise is at 05:53 and sunset at 18:17. On the last day of May, sunrise is at 05:50 and sunset at 18:22 +0530.

Sunshine

In Dematagahapelessa, the average sunshine in May is 10.7h.

UV index

March through September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: An average maximum UV index of 7 in May leads to these recommendations:
Dodge overexposure. Fair-skinned people can get singed in less than 20 minutes. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.