May weather forecast
Vankalai, Sri Lanka

May, the last month of the spring in Vankalai, is another hot month, with an average temperature varying between 31.2°C (88.2°F) and 28.1°C (82.6°F).

Temperature

In May, Vankalai experiences a barely noticeable shift in meteorological conditions, with average high-temperatures moving from 31.4°C (88.5°F) in April to a still tropical 31.2°C (88.2°F). Vankalai encounters a small divergence from daytime high temperatures, averaging a low-temperature of 28.1°C (82.6°F) during May nights.

Heat index

The average heat index in May is calculated to be an extremely hot 40°C (104°F). Extra safeguards are necessary to prevent heat exhaustion and heat cramps. Prolonged activity might cause heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', reflects the feeling of heat when considering both air temperature and humidity. The influence of weather is personal, differing among individuals based on variations in body mass, stature, and the degree of physical exertion. It is important to note that direct sunlight can intensify the weather impact, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. 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.
The human body keeps its cool primarily through perspiration, as this process enables sweat to evaporate, taking away the excess heat. Under conditions of high temperature and humidity (enhanced heat index), sweat production is compromised, exacerbating the sensation of warmth. When heat uptake goes beyond the body's cooling mechanisms, there's a surge in body temperature, posing health risks.

Humidity

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

Rainfall

In Vankalai, during May, the rain falls for 13.2 days and regularly aggregates up to 51mm (2.01") of precipitation. Throughout the year, in Vankalai, Sri Lanka, there are 181.2 rainfall days, and 849mm (33.43") of precipitation is accumulated.

Daylight

The average length of the day in May is 12h and 32min.
On the first day of May in Vankalai, sunrise is at 05:53 and sunset at 18:20. On the last day of the month, sunrise is at 05:49 and sunset at 18:26 +0530.

Sunshine

In May, the average sunshine is 11.2h.

UV index

January through October and December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The UV index of 7 during May translates into the following guidance:
Use measures and accept sun safety conventions. Guarding against skin and eye trauma is of high priority. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. During bright days, sunglasses that offer UVA and UVB defense are recommended.