May weather forecast
Puttalam, Sri Lanka

May features slightly cooler temperatures than April, with increasing cloud cover and rainfall days. Despite the rain, the city’s natural charm remains unaffected. The high relative humidity defines the weather, giving it a distinctive moist subtropical feeling. Even though the weather leans towards increased humidity and precipitation, it is complemented by a consistently high ultraviolet index. May distinguishes itself through a noticeable increase in wind speed reaching up to 24.4km/h (15.2mph).

Temperature

Puttalam, Sri Lanka, experiences a recorded average high-temperature of a still hot 31.3°C (88.3°F) in May, closely aligned with April's 31.9°C (89.4°F). The month of May shows a minor drop from daytime temperatures, generally recording a low average of 27.4°C (81.3°F).

Heat index

The heat index value during May is computed to be a blisteringly hot 41°C (105.8°F). Ensure extra safety measures, heat exhaustion and heat cramps are likely. Continuous activity might result in heatstroke.
Know that the heat index computations account for shaded terrains and slight winds. The heat index could experience an increase of 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is the outcome of merging air's temperature and its humidity metrics. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. Take note that direct exposure to the sun can increase the felt temperature, possibly adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values hold particular significance for children. Kids generally face higher risks than adults as they sweat less. Along with their large skin surface compared to their small bodies and higher heat production due to their activities, their vulnerability is increased.
In response to overheating, the human body perspires to cool down, mainly through the evaporation of sweat. During conditions of high air temperature and humidity (high heat index), the body's ability to perspire is inhibited, increasing the sensation of warmth. Excessive heat that's not properly managed leads to increased body temperatures and resultant health issues.

Humidity

In May, the average relative humidity in Puttalam is 78%.

Rainfall

In Puttalam, during May, the rain falls for 19.8 days and regularly aggregates up to 88mm (3.46") of precipitation. Throughout the year, there are 221.7 rainfall days, and 1071mm (42.17") of precipitation is accumulated.

Daylight

In Puttalam, the average length of the day in May is 12h and 29min.
On the first day of the month, sunrise is at 05:55 and sunset at 18:20. On the last day of May, sunrise is at 05:51 and sunset at 18:25 +0530.

Sunshine

In Puttalam, the average sunshine in May is 9.7h.

UV index

The months with the highest UV index in Puttalam, Sri Lanka, are January through December, with an average maximum UV index of 7. January through December, with an average maximum UV index of 7, are months with the lowest UV index. A UV Index value of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for the ordinary person.
Note: The maximum daily UV index of 7 during May translates into the following directions:
Stick with precautions and abide by sun safety procedures. Evading sunburn is essential. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. During bright days, sunglasses that offer UVA and UVB defense are recommended.