April weather forecast
Vavuniya, Sri Lanka

April welcomes a further upsurge in temperature, while a notable increase in showers make for balmy afternoons in Vavuniya. This month records a high precipitation amounting to 104mm (4.09"), a leap from the March figures, offering relief from the persistent summer heat. Dawn witnesses the city drenched in dew, and by midday, it basks lightly in the sun. The weather fluctuates between cloudy and clear, providing an opportunity to gaze at the night sky intermittently. Despite the heat, the cool night winds add to the serenity of the month.

Temperature

During March and April, Vavuniya experiences its warmest period, with an average high-temperature of 34.3°C (93.7°F).

Heat index

The heat index for April is estimated at a burning hot 51°C (123.8°F). Take caution: Heat exhaustion and heat cramps are probable. Heatstroke may be imminent with ongoing effort.
Keep in mind the heat index values are meant for areas in shade and with light wind. The heat index might be elevated by 15 Fahrenheit (8 Celsius) degrees due to direct sun exposure.
Note: The heat index, also known as 'feels like' or 'real feel', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. The individual's experience of temperature can be shaped by numerous aspects such as metabolic variations, physical exertion, and attire. Direct sun exposure is noteworthy in its ability to escalate the felt temperature, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values hold great significance to children. Young ones are generally more prone to risk than adults due to their reduced ability to sweat. Their large skin surface area relative to their diminutive bodies and elevated heat production from their activities further enhance this risk.
The human body keeps its cool primarily through perspiration, as this process enables sweat to evaporate, taking away the excess heat. In high relative humidity, the body's ability to evaporate heat is diminished, resulting in a heightened feeling of warmth. The body is at risk of dehydration and related complications when it fails to shed excessive heat.

Humidity

In Vavuniya, the average relative humidity in April is 75%.

Rainfall

In April, in Vavuniya, Sri Lanka, the rain falls for 24.2 days. Throughout April, 104mm (4.09") of precipitation is accumulated. Throughout the year, in Vavuniya, there are 199.1 rainfall days, and 893mm (35.16") of precipitation is accumulated.

Daylight

In April, the average length of the day in Vavuniya is 12h and 19min.
On the first day of the month, sunrise is at 06:05 and sunset at 18:18. On the last day of April, in Vavuniya, sunrise is at 05:52 and sunset at 18:18 +0530.

Sunshine

The average sunshine in April is 9.7h.

UV index

February through September, 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 unsafe exposure to UV radiation for average individuals.
Note: The daily maximum UV index of 7 in April interprets into the following advice:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. 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. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.