May weather forecast
Wattegama, Sri Lanka

The last month of the spring, May, is also a hot month in Wattegama, Sri Lanka, with temperature in the range of an average low of 21.8°C (71.2°F) and an average high of 30.1°C (86.2°F).

Temperature

May registers an average high-temperature of a still hot 30.1°C (86.2°F), slightly varied from April's 31.2°C (88.2°F). Throughout the month of May, the average temperature dips to a pleasant 21.8°C (71.2°F) at night.

Heat index

Throughout May, the heat index is evaluated at a fiery hot 38°C (100.4°F). Greater preventive actions are needed, heat exhaustion and heat cramps are likely. Persistent activity could provoke 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 'felt air temperature' or 'apparent temperature', combines both the air temperature and the humidity level to give a perceived human temperature. The influence of weather is personal, differing among individuals based on variations in body mass, stature, and the degree of physical exertion. Realize that direct exposure to sunlight can augment the felt heat, leading to a potential increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Kids are usually more vulnerable than adults, given their lesser sweating ability. Along with their larger skin surface relative to their small stature and the excess heat due to their activity, their risk is amplified.
The human body keeps its cool primarily through perspiration, as this process enables sweat to evaporate, taking away the excess heat. In the presence of high relative humidity, the evaporation rate diminishes, resulting in the body retaining more warmth compared to dry conditions. Heat absorption that surpasses the body's shedding capability can lead to overheating and varying levels of dehydration.

Humidity

In Wattegama, the average relative humidity in May is 80%.

Rainfall

In Wattegama, in May, it is raining for 28.6 days, with typically 163mm (6.42") of accumulated precipitation. In Wattegama, during the entire year, the rain falls for 278.4 days and collects up to 1466mm (57.72") of precipitation.

Daylight

The average length of the day in May is 12h and 28min.
On the first day of May, sunrise is at 05:52 and sunset at 18:15. On the last day of the month, sunrise is at 05:49 and sunset at 18:20 +0530.

Sunshine

In Wattegama, the average sunshine in May is 10.4h.

UV index

The months with the highest UV index in Wattegama are January through September, November and December, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: The maximum daily UV index, 6 in May, converts into the following recommendations:
Act on precautions and pay attention to sun safety recommendations. Avoidance of sunburn is obligatory. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.