May weather forecast
Mallawapitiya, Sri Lanka

May, the last month of the spring in Mallawapitiya, is another tropical month, with an average temperature varying between 23°C (73.4°F) and 31.8°C (89.2°F).

Temperature

The beginning of May records an average high-temperature of a still hot 31.8°C (89.2°F), marking a negligible difference from April's 32.9°C (91.2°F). Throughout May, Mallawapitiya witnesses a consistent average low-temperature of 23°C (73.4°F).

Heat index

May's mean heat index is appraised at an extremely hot 42°C (107.6°F). Heightened precautions are necessary, heat cramps and heat exhaustion are potential risks. Continuous activity could lead to heatstroke.
Evaluating the heat index requires understanding its values in the shade and with gentle winds. Exposure to the direct sun might augment heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', takes into account both air temperature and humidity to illustrate what people actually feel. This effect is personal, influenced by the individual's physical activity and heat sensitivity, shaped by factors including wind, attire, and metabolic variations. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Juveniles often do not understand the need to recuperate and rehydrate. Thirst is a delayed symptom of dehydration - hence, it is vital to maintain hydration, particularly during ongoing physical activities.
The physiological response of the human body to excess warmth is to perspire, thereby cooling itself through sweat evaporation. An elevated level of relative humidity hinders evaporation, leading to decreased heat elimination from the body, inducing a sensation of excess heat. Excessive heat that's not properly managed leads to increased body temperatures and resultant health issues.

Humidity

In Mallawapitiya, the average relative humidity in May is 77%.

Rainfall

In Mallawapitiya, in May, during 21.6 rainfall days, 117mm (4.61") of precipitation is typically accumulated. Throughout the year, in Mallawapitiya, there are 217.7 rainfall days, and 1165mm (45.87") of precipitation is accumulated.

Daylight

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

Sunshine

In May, the average sunshine in Mallawapitiya, Sri Lanka, is 10.7h.

UV index

The months with the highest UV index are March through September, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for the average person.
Note: An average UV index of 7 in May transforms into this advice:
Enforce precautions and stick to sun safety measures. Preservation from skin and eye damage is essential. 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. Tightly woven clothing, when worn loosely, shields effectively against the Sun.