May weather forecast
Kalmunai, Sri Lanka

May continues to uphold the summer season in Kalmunai with the city's temperatures peaking around 32.7°C (90.9°F). The amplified temperatures align with the city's tropical climate. Rainfall and humidity remain without any drastic change, making the month humid and warm. The finite interplay between rainfall and temperature creates a unique landscape of weather patterns. While summer reigns strong, the residents also expect frequent showers.

Temperature

Kalmunai greets May with an average high-temperature of a still tropical 32.7°C (90.9°F), marking a slight deviation from the preceding month. Throughout May, an average nighttime temperature of 26.6°C (79.9°F) is experienced.

Heat index

The heat index value for May is computed to be a scorching 44°C (111.2°F). Beware: Heat cramps and heat exhaustion are very likely. Heatstroke is imminent with prolonged activity.
It is worth noting that heat index values are gauged for conditions in the shade and light breezes. With exposure to direct sunshine, the heat index could climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. It is essential to be conscious of the fact that direct sunlight can intensify the felt heat, leading to an elevation in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young individuals are generally in more danger than adults due to their lower capacity to sweat. Moreover, their large skin surface in relation to their small bodies and the increased heat generation from their activities makes them more vulnerable.
Through perspiration, the body has a natural mechanism to eliminate excessive heat via sweat evaporation. Under high air temperature and high humidity (high heat index) conditions, the body's ability to perspire is compromised, increasing the sensation of heat. Potential thermal conditions emerge as the body's heat gain outpaces its cooling mechanisms.

Humidity

In May, the average relative humidity in Kalmunai is 74%.

Rainfall

In May, the rain falls for 20.7 days. Throughout May, 79mm (3.11") of precipitation is accumulated. In Kalmunai, during the entire year, the rain falls for 237.8 days and collects up to 1259mm (49.57") of precipitation.

Sea temperature

April and May, with an average sea temperature of 29.8°C (85.6°F), are months with the warmest seawater.
Note: Swimming, diving, and other activities in water temperatures between 25°C (77°F) and 29°C (84.2°F) are thought to be quite enjoyable and satisfying for extended periods, with no discomfort.

Daylight

The average length of the day in May is 12h and 28min.
On the first day of May, sunrise is at 05:48 and sunset at 18:11. On the last day of the month, sunrise is at 05:44 and sunset at 18:16 +0530.

Sunshine

In Kalmunai, Sri Lanka, the average sunshine in May is 11.6h.

UV index

January through October, with an average maximum UV index of 7, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for the average person.
Note: The UV index of 7 during May leads to these advisories:
Employ safeguards and advocate sun safety protocols. Shielding against skin and eye damage is crucial. It's important to stay in the shade and limit exposure to the sun from 10 a.m. to 4 p.m., when UV radiation is most intense, although remember that shade structures may not provide full sun protection. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Take warning! Reflective sand and water surfaces intensify the Sun's UV rays.