April weather forecast
Hirimbura, Sri Lanka

April, like March, is another hot spring month in Hirimbura, Sri Lanka, with an average temperature fluctuating between 30.3°C (86.5°F) and 26.4°C (79.5°F).

Temperature

March and April are the warmest months, with an average high-temperature of 30.3°C (86.5°F).

Heat index

The average heat index in April is estimated at a fiery hot 38°C (100.4°F). Exercise enhanced safety steps, heat cramps and heat exhaustion are probable. Heatstroke could be a result of sustained activity.
It is essential to grasp that the heat index's numbers are for shade and light wind settings. Uninterrupted exposure to the sun may boost the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is a single figure representing how weather conditions feel when combining temperature and humidity. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. One's exposure to direct sunlight has the potential to intensify the heat sensation, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Children typically face more danger than adults as their sweat production is usually lower. Additionally, the bigger skin surface compared to their small size and the increased heat due to their activeness exacerbate the risk.
The human body has a built-in cooling mechanism through perspiration; evaporating sweat dissipates the excess heat. A surge in relative humidity can disrupt the body's normal cooling function by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. Accumulating heat beyond the body's cooling measures leads to rising temperatures and potential ailments.

Humidity

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

Rainfall

In Hirimbura, during April, the rain falls for 26.2 days and regularly aggregates up to 134mm (5.28") of precipitation. In Hirimbura, Sri Lanka, during the entire year, the rain falls for 287.3 days and collects up to 2026mm (79.76") of precipitation.

Daylight

In Hirimbura, the average length of the day in April is 12h and 16min.
On the first day of the month, sunrise is at 06:07 and sunset at 18:18. On the last day of April, in Hirimbura, Sri Lanka, sunrise is at 05:56 and sunset at 18:16 +0530.

Sunshine

April has the most sunshine of the year, with an average of 9.3h of sunshine.

UV index

January through April, June through August, October through December, 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 hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: In April, a daily maximum UV index of 7 leads to the following instructions:
Embrace precautions and observe sun safety norms. Evasion of sunburn is a necessity. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. Stay sun-safe with clothing that is both closely woven and worn loosely.