April weather forecast
Deraniyagala, Sri Lanka

April, like March, is a hot spring month in Deraniyagala, Sri Lanka, with an average temperature varying between 30°C (86°F) and 21.1°C (70°F).

Temperature

The commencement of April introduces an average high-temperature of a still tropical 30°C (86°F), closely mirroring the preceding month. Throughout April nights, Deraniyagala registers an average low-temperature of 21.1°C (70°F).

Heat index

In April, the average heat index is evaluated at a very hot 39°C (102.2°F). Adopt special protective actions against heat exhaustion and heat cramps. Long-duration activity risks heatstroke.
Consider that heat index readings are for situations in the shade and light wind. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'feels like' or 'real feel', is a single figure representing how weather conditions feel when combining temperature and humidity. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. 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 children. Young individuals usually face more risks than adults due to their lower sweat production. Their large skin surface area relative to their tiny bodies and high heat production from their activities adds to their risk.
The process of perspiration is vital for the human body to get rid of excess warmth by allowing sweat to evaporate. In situations of high air temperature combined with high humidity (significant heat index), the body's ability to perspire is reduced, heightening the sense of warmth. Increasing body temperatures can be a precursor to dehydration if the body can't shed the extra heat.

Humidity

The average relative humidity in April is 86%.

Rainfall

In Deraniyagala, in April, during 29.4 rainfall days, 248mm (9.76") of precipitation is typically accumulated. In Deraniyagala, during the entire year, the rain falls for 317.3 days and collects up to 2422mm (95.35") of precipitation.

Daylight

The average length of the day in April is 12h and 17min.
On the first day of the month, sunrise is at 06:06 and sunset at 18:18. On the last day of April, in Deraniyagala, sunrise is at 05:54 and sunset at 18:16 +0530.

Sunshine

With an average of 8.4h of sunshine, April has the most sunshine of the year in Deraniyagala.

UV index

January through August, November and December, with an average maximum UV index of 6, are months with the highest UV index in Deraniyagala. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for average individuals.
Note: The daily high UV index of 6 during April translates into the following recommendations:
Undertake protective measures and comply with sun safety rules. Shielding against skin and eye damage is essential. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.