May weather forecast
Dambulla, Sri Lanka

The month of May continues the trend of warmth and illumination in Dambulla, with ample hours of daylight and abundant sunshine. As the city moves deeper into the year, the weather exhibits slight changes in temperature, rainfall, and humidity. Notably, the wind speed peaks during this month, with an average speed of 15.9km/h (9.9mph), which promotes a refreshing breeze amidst the tropical heat. The weather remains favorable for outdoor activities with a high UV index, which can be enjoyed best under the protective shade of Dambulla's magnificent caves.

Temperature

Dambulla marks the start of May with an average high-temperature of a still hot 34.2°C (93.6°F), hinting at a slight fluctuation from April's 34.9°C (94.8°F). An average low-temperature of 24.5°C (76.1°F) is common during the nights of May.

Heat index

Throughout May, the heat index is estimated at a blazing hot 49°C (120.2°F). Mindful: Heat cramps and heat exhaustion are to be expected. Extended physical effort might result in heatstroke.
One should consider that heat index numbers are for shaded settings and light wind. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Additional elements encompassing metabolic differences, the degree of physical activity, and attire can impact the individual's perception of temperature. Recognize that direct exposure to the sun can escalate the heat effect, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are primarily vital for children. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.
The natural cooling mechanism in humans involves perspiration, where the evaporation of sweat balances out excessive warmth. When relative humidity is heightened, it slows the rate of evaporation, thereby decreasing the body's ability to shed heat and creating a sensation of overheating. If heat absorption exceeds the body's cooling ability, body temperature can elevate, resulting in potential thermal illnesses.

Humidity

In May, the average relative humidity is 72%.

Rainfall

In Dambulla, in May, it is raining for 17.4 days, with typically 83mm (3.27") of accumulated precipitation. In Dambulla, during the entire year, the rain falls for 196.8 days and collects up to 943mm (37.13") of precipitation.

Daylight

In May, the average length of the day in Dambulla is 12h and 29min.
On the first day of May in Dambulla, sunrise is at 05:52 and sunset at 18:16. On the last day of the month, sunrise is at 05:48 and sunset at 18:21 +0530.

Sunshine

The average sunshine in May in Dambulla is 11.2h.

UV index

February through October, with an average maximum UV index of 7, are months with the highest UV index in Dambulla. A UV Index reading of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The UV index of 7 during May leads to these advisories:
Skirt overexposure. People with light complexions might get scorched in under 20 minutes. Remember that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. Make an effort to avoid direct sun exposure during these hours. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.