May weather forecast
Unawatuna, Sri Lanka

The weather in May in Unawatuna stands out for its significant rise in precipitation to 302mm (11.89"), marking it as the wettest month of the year. Despite the increase in rainfall, the temperatures remain relatively stable, maintaining the region's tropical charm. In rhythm with the waves of the sea, whose temperature hovers around 29°C (84.2°F), locals and tourists find solace along the sandy shores. A comparison with April's weather reveals a dramatic increase in rainfall. Moving forward, June's forecast will offer a slight dip in rainfall, ensuring a comfortable weather continuity.

Temperature

The arrival of May sees a recorded average high-temperature of a warm 29.5°C (85.1°F), showing little divergence from the previous month's conditions. An average low-temperature of 26.7°C (80.1°F), slightly less than the daytime peak, marks the month of May in Unawatuna.

Heat index

May's average heat index is computed to be a fiery hot 36°C (96.8°F). Undertake special precautions, the probability of heat exhaustion and heat cramps is high. Prolonged activity may provoke heatstroke.
Thinking about the heat index, one should account for its values in shaded areas with gentle breezes. Heat index values may surge by up to 15 Fahrenheit (8 Celsius) degrees in the presence of direct sunlight.
Note: The heat index, also known as 'feels like' or 'real feel', shows a temperature sensation when both heat and moisture conditions are combined. Additional elements encompassing metabolic differences, the degree of physical activity, and attire can impact the individual's perception of temperature. One must note that being under the direct sun can escalate the heat's effects, with the heat index possibly rising by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for 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.
In the face of high temperatures, the human body's reflex is to perspire, leveraging sweat evaporation for cooling. Under high air temperature coupled with high humidity (high heat index), the body's perspiration is reduced, intensifying the sensation of heat. When heat uptake goes beyond the body's cooling mechanisms, there's a surge in body temperature, posing health risks.

Humidity

The average relative humidity in May is 81%.

Rainfall

The month with the most rainfall is May, when the rain falls for 27.7 days and typically aggregates up to 302mm (11.89") of precipitation.

Sea temperature

In Unawatuna, the average seawater temperature in May is 29°C (84.2°F).
Note: Water temperatures ranging between 25°C (77°F) and 29°C (84.2°F) are regarded as very warm, making swimming, diving, and similar water activities pleasurable for extended periods.

Daylight

In Unawatuna, Sri Lanka, the average length of the day in May is 12h and 24min.
On the first day of the month, sunrise is at 05:55 and sunset at 18:16. On the last day of May, sunrise is at 05:53 and sunset at 18:20 +0530.

Sunshine

In Unawatuna, the average sunshine in May is 9h.

UV index

The months with the lowest UV index are May and September, 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 the average person.
Note: In May, an average UV index of 6 transforms into the following instructions:
Employ safeguards and advocate sun safety protocols. Shielding against skin and eye damage is crucial. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Notice! The reflection of water and sand increases the UV radiation significantly.