April weather forecast
Kattankudy, Sri Lanka

April, like March, is another hot spring month in Kattankudy, Sri Lanka, with an average temperature fluctuating between 31.8°C (89.2°F) and 25.9°C (78.6°F).

Temperature

A minimal variation is noted in Kattankudy's average high-temperature at the onset of April, reaching a still hot 31.8°C (89.2°F) from March's 30.1°C (86.2°F). In April, Kattankudy experiences an average nighttime temperature of 25.9°C (78.6°F).

Heat index

The average heat index in April is calculated to be an extremely hot 42°C (107.6°F). Ensure extra safety measures, heat exhaustion and heat cramps are likely. Continuous activity might result in heatstroke.
Evaluating the heat index requires understanding its values in the shade and with gentle winds. Heat index values may rise by up to 15 Fahrenheit (8 Celsius) degrees when exposed to direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'real feel', evaluates the perceived heat by adding the effect of moisture in the air. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. 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 especially vital to children. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.
As a reaction to high temperatures, the human body begins to perspire, using the evaporation of sweat to lower its temperature. With excessive moisture in the atmosphere, the effectiveness of the evaporation process is decreased, causing the body to cool down less efficiently, leading to a sensation of overheating. Overheating can ensue when the body accumulates more heat than it can release, and dehydration severity may vary.

Humidity

In April, the average relative humidity is 75%.

Rainfall

In Kattankudy, during April, the rain falls for 19.1 days and regularly aggregates up to 57mm (2.24") of precipitation. Throughout the year, there are 237.8 rainfall days, and 1259mm (49.57") of precipitation is accumulated.

Daylight

In April, the average length of the day in Kattankudy is 12h and 18min.
On the first day of the month, sunrise is at 06:00 and sunset at 18:12. On the last day of April, sunrise is at 05:48 and sunset at 18:12 +0530.

Sunshine

In April, the average sunshine in Kattankudy is 11.2h.

UV index

The months with the highest UV index in Kattankudy, Sri Lanka, are January through October, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 7 in April transforms into the following instructions:
Undertake protective measures and comply with sun safety rules. Shielding against skin and eye damage is essential. Stay out of direct sunlight and seek shade between 10 a.m. and 4 p.m., when UV radiation is strongest, but remember that shade devices may not offer full sun protection. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.