May weather forecast
Jalthara, Sri Lanka

The last month of the spring, May, is another tropical month in Jalthara, Sri Lanka, with an average temperature fluctuating between 30.6°C (87.1°F) and 26.3°C (79.3°F).

Temperature

As May takes its course, Jalthara's average high-temperature registers at a still tropical 30.6°C (87.1°F), closely aligning with the preceding month. Throughout May, Jalthara reports a steady low-temperature average of 26.3°C (79.3°F), slightly lower than its daytime counterpart.

Heat index

The heat index for May is estimated at a scorching 40°C (104°F). Undertake additional safety actions, risk of heat cramps and heat exhaustion is significant. Persistent activity may induce heatstroke.
Regarding the heat index, one should be aware it's determined by shaded settings and mild winds. Exposure to direct sunlight may make the heat index values climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Additional elements including metabolic differences, the level of physical activity, and attire have a role in shaping the individual's temperature perception. Do note, being directly under sun rays can amplify the heat you feel, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Typically, young kids are at a higher risk than adults since they sweat less. Also, the larger skin surface in proportion to their small bodies and the heightened heat production due to their active nature adds to their vulnerability.
The body's inherent cooling system operates through perspiration, wherein evaporating sweat offsets excessive heat. In situations of high air temperature combined with high humidity (significant heat index), the body's ability to perspire is reduced, heightening the sense of warmth. Accumulating more heat than the body can dissipate leads to an uptick in body temperature, with potential heat stress consequences.

Humidity

In May, the average relative humidity is 81%.

Rainfall

In May, the rain falls for 28.8 days. Throughout May, 306mm (12.05") of precipitation is accumulated. In Jalthara, during the entire year, the rain falls for 289.4 days and collects up to 2262mm (89.06") of precipitation.

Daylight

In May, the average length of the day in Jalthara is 12h and 26min.
On the first day of the month, sunrise is at 05:55 and sunset at 18:17. On the last day of May, sunrise is at 05:52 and sunset at 18:22 +0530.

Sunshine

In May, the average sunshine in Jalthara is 8.6h.

UV index

May, June, August and October, with an average maximum UV index of 6, are months with the lowest UV index in Jalthara. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.
Note: The daily high UV index of 6 during May translates into the following recommendations:
Stick with precautions and abide by sun safety procedures. Evading sunburn is essential. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.