April weather forecast
Dehiwala, Sri Lanka

April here in Dehiwala, Sri Lanka, is marked by notably high levels of rainfall, as it is one of the peak months of the year for precipitation. Regardless of the season, the city manages to sustain its charm via its moderate to high temperatures and increased daylight hours. The distinctions between March and April are not profound given the steady weather pattern. However, April does showcase a substantial spike in rainfall, recording 139mm (5.47"), almost twice that of March. With April's conclusion, residents eagerly anticipate the bloom of May amidst an expectation of increased rainfall and humidity.

Temperature

In Dehiwala, the month of April registers the highest temperatures, averaging 31.4°C (88.5°F) at the peak and 26.1°C (79°F) at the lowest.

Heat index

Throughout April, the heat index is estimated at a scorching 41°C (105.8°F). Additional precautions are required to avert heat cramps and heat exhaustion. Persistent activity may culminate in heatstroke.
It is crucial to understand that heat index figures are for shade and gentle wind conditions. Direct sunshine exposure could raise heat index values by as much as 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is an estimation of the warmth sensation when considering humidity levels. A person's impression of weather can be shaped by several aspects, among them metabolic variations, pregnancy, and levels of physical activity. 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 highly important for children. Children often fail to recognize the requirement to rest and rehydrate. Thirst, being a late symptom of dehydration, underlines the importance of maintaining hydration, especially during ongoing physical activities.
Sweat evaporation, driven by perspiration, is the method the human body uses to rid itself of excessive warmth. Under high air temperature coupled with high humidity (high heat index), the body's perspiration is reduced, intensifying the sensation of heat. Heat absorption that surpasses the body's shedding capability can lead to overheating and varying levels of dehydration.

Humidity

In Dehiwala, the average relative humidity in April is 78%.

Rainfall

In Dehiwala, in April, it is raining for 25.8 days, with typically 139mm (5.47") of accumulated precipitation. In Dehiwala, Sri Lanka, during the entire year, the rain falls for 285.6 days and collects up to 2201mm (86.65") of precipitation.

Sea temperature

The month with the warmest seawater in Dehiwala, Sri Lanka, is April, with an average sea temperature of 29.6°C (85.3°F).
Note: Temperatures between 25°C (77°F) and 29°C (84.2°F) are excellent for swimming, diving, and other water activities, providing comfort and enjoyment for extended periods without discomfort.

Daylight

In April, the average length of the day in Dehiwala is 12h and 17min.
On the first day of the month, sunrise is at 06:08 and sunset at 18:20. On the last day of April, sunrise is at 05:56 and sunset at 18:18 +0530.

Sunshine

The average sunshine in April in Dehiwala is 9h.

UV index

January through April, June, July, September, November and December, with an average maximum UV index of 7, are months with the highest UV index in Dehiwala. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for the average person.
Note: In April, the maximum UV index of 7 suggests these recommendations:
Guard oneself from overexposure. Defence against sun injury is vital. 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. Enhance your sun protection with tightly woven, yet airy clothing. Warning! The reflection of sand and water increases the UV dose.