May weather forecast
Mattegoda, Sri Lanka

The last month of the spring, May, is another tropical month in Mattegoda, Sri Lanka, with an average temperature varying between 30.3°C (86.5°F) and 26.4°C (79.5°F).

Temperature

The ushering in of May brings an average high-temperature of a still hot 30.3°C (86.5°F), closely mirroring the 31.4°C (88.5°F) of April. Mattegoda maintains an average of approximately a warm 26.4°C (79.5°F) during May nights, with only a minimal decrease from the daytime temperature.

Heat index

May's mean heat index is estimated at a fiery hot 39°C (102.2°F). More protective measures are required - heat exhaustion and heat cramps are likely. Heatstroke may follow lengthy activity.
It is worth noting that heat index values are gauged for conditions in the shade and light breezes. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Consider the sun's direct rays and their impact; they can potentially increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Young people are generally more susceptible than adults because they perspire less. Furthermore, their proportionally larger skin surface to their petite bodies and the increased heat output from their actions add to the risk.
The body's inherent cooling system operates through perspiration, wherein evaporating sweat offsets excessive heat. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. As the body accumulates more heat than it can release, body temperature goes up, increasing the risk of heat-related health issues.

Humidity

In Mattegoda, Sri Lanka, the average relative humidity in May is 81%.

Rainfall

In Mattegoda, in May, it is raining for 27.1 days, with typically 279mm (10.98") of accumulated precipitation. Throughout the year, there are 272.3 rainfall days, and 2039mm (80.28") of precipitation is accumulated.

Daylight

In Mattegoda, the average length of the day in May is 12h and 26min.
On the first day of the month, sunrise is at 05:56 and sunset at 18:18. On the last day of May, in Mattegoda, sunrise is at 05:53 and sunset at 18:22 +0530.

Sunshine

The average sunshine in May is 8.7h.

UV index

The months with the lowest UV index are May, June, August and October, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for the average person.
Note: The daily maximum UV index of 6 in May interprets into the following advice:
Conform to measures and uphold sun safety traditions. Warding off skin and eye harm is necessary. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.