May weather forecast
Kossinna, Sri Lanka

May, the last month of the spring in Kossinna, is another tropical month, with an average temperature varying between 30.1°C (86.2°F) and 21.8°C (71.2°F).

Temperature

With the start of May, Kossinna measures an average high-temperature of a still tropical 30.1°C (86.2°F), not significantly differing from April's 31.2°C (88.2°F). In the month of May, the nighttime temperature dips to a steady average of 21.8°C (71.2°F).

Heat index

For May, the heat index is calculated to be a very hot 38°C (100.4°F). Incorporate special precautions, risk of heat exhaustion and heat cramps is substantial. Sustained activity could cause heatstroke.
When referencing the heat index, its values are suitable for shady environments and light breezes. The heat index has the potential to rise by 15 Fahrenheit (8 Celsius) degrees with direct sunshine exposure.
Note: The heat index, also known as 'real feel' or 'felt air temperature', measures the perceived warmth when incorporating the humidity present in the air. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. Should you be directly under the sun, anticipate a possible increase in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Children frequently underestimate the importance of resting and drinking fluids. Thirst is a symptom of advanced dehydration - hence the need to hydrate regularly, especially during protracted physical exercises.
The body's innate mechanism to counteract overheating is through perspiration, as it leverages the cooling effects of sweat evaporation. Augmented relative humidity impedes typical body cooling mechanisms by lowering the evaporation rate, resulting in decreased body cooling and an amplified perception of heat. Accumulating heat beyond the body's cooling measures leads to rising temperatures and potential ailments.

Humidity

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

Rainfall

In Kossinna, Sri Lanka, during May, the rain falls for 28.6 days and regularly aggregates up to 163mm (6.42") of precipitation. Throughout the year, there are 278.4 rainfall days, and 1466mm (57.72") of precipitation is accumulated.

Daylight

In May, the average length of the day 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 18:21 +0530.

Sunshine

In May, the average sunshine is 10.4h.

UV index

The months with the highest UV index are January through September, November and December, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for the average person.
Note: An average UV index of 6 in May transforms into this advice:
Eschew overexposure. Those with light skin may suffer burns in fewer than 20 minutes. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.