May weather forecast
Uduthurai, Sri Lanka

May, the last month of the spring in Uduthurai, is another tropical month, with an average temperature ranging between min 29°C (84.2°F) and max 30.7°C (87.3°F).

Temperature

Uduthurai's warmest temperatures are experienced in May, with average high temperatures of 30.7°C (87.3°F) and lows of 29°C (84.2°F).

Heat index

For most parts of May, the heat index is calculated to be an extremely hot 40°C (104°F). More protective measures are required - heat exhaustion and heat cramps are likely. Heatstroke may follow lengthy activity.
Heat index values are typically calculated for conditions of shade and a light breeze. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. Elements such as metabolic variations, pregnancy, and physical exertion can shape one's weather perception. Keep in mind that direct sunshine exposure can amplify the weather's effects, possibly increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Children often lack awareness of the importance of taking breaks and rehydrating. The feeling of thirst is a late indication of dehydration, so maintaining hydration, especially during long periods of physical activity, is critical.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. Under conditions of increased relative humidity, the evaporation rate lessens, causing the body to retain more heat than under less humid conditions. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

The months with the highest humidity are May and September, with an average relative humidity of 79%.

Rainfall

In Uduthurai, during May, the rain falls for 10.3 days and regularly aggregates up to 48mm (1.89") of precipitation. In Uduthurai, during the entire year, the rain falls for 189.6 days and collects up to 1106mm (43.54") of precipitation.

Daylight

In Uduthurai, Sri Lanka, the average length of the day in May is 12h and 34min.
On the first day of May in Uduthurai, sunrise is at 05:51 and sunset at 18:19. On the last day of the month, sunrise is at 05:46 and sunset at 18:25 +0530.

Sunshine

May and June, with an average of 11.6h of sunshine, are months with the most sunshine in Uduthurai, Sri Lanka.

UV index

The months with the highest UV index are January through September and December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: The UV index of 7 in May translates into these instructions:
Deter overexposure. Protecting against the sun's effects is essential. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.