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 experiences a recorded average high-temperature of a still tropical 32.7°C (90.9°F) in May, closely aligned with April's 31.8°C (89.2°F). During the nights in May, Kalmunai observes an average low-temperature of 26.6°C (79.9°F).

Heat index

During May, the heat index is estimated at a blisteringly hot 44°C (111.2°F). Be wary: Heat exhaustion and heat cramps are highly anticipated. With continued activity, heatstroke is very likely.
Know that the heat index computations account for shaded terrains and slight winds. The direct sun can potentially cause the heat index to increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', gauges the sensation of temperature factoring in the air's moisture content. The influence of weather is personal, differing among a variety of individuals based on differences in body mass, stature, and the level of physical activity. It is noteworthy to mention that direct sunlight exposure can augment the felt temperature, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Young individuals are typically more threatened than adults due to their reduced perspiration. Also, the larger skin surface proportionate to their small bodies and the increased heat from their activities magnify their risk.
To combat high temperatures, the human body perspires and relies on sweat evaporation for cooling. With an abundance of moisture present in the air, the process of evaporation becomes less effective, and the body fails to cool down as it should, leading to the sensation of overheating. As the body gains more heat than it can dissipate, there's a risk of increasing temperatures and resultant overheating.

Humidity

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

Rainfall

In Kalmunai, in May, it is raining for 20.7 days, with typically 79mm (3.11") of accumulated precipitation. 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 in Kalmunai.
Note: For engaging in any water activities, temperatures from 25°C (77°F) to 29°C (84.2°F) are viewed as outstanding and exceptionally pleasing for prolonged durations.

Daylight

In May, the average length of the day 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

The average sunshine in May in Kalmunai 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 estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: During May, 7 as the daily maximum UV index converts into the following advice:
Avert overexposure. Light-skinned people might experience burning in less than 20 minutes. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Note! Reflective surfaces like sand and water heighten the UV radiation levels.