April weather forecast
Polonnaruwa, Sri Lanka

April in Polonnaruwa marks a transition into a much hotter phase. A peak in temperatures is observed, making it the hottest month of the year. The weather pattern takes a turn, featuring the year's highest temperatures climbing up to an average of 34.9°C (94.8°F). The fluctuation in weather conditions is marked yet fleeting, as the heat subsides into a more temperate clime come May.

Temperature

Polonnaruwa's temperature records reveal April as the warmest month, marked by average highs of 34.9°C (94.8°F) and lows of 23.5°C (74.3°F).

Heat index

For most parts of April, the heat index is computed to be a burning hot 52°C (125.6°F). Stay mindful: Heat exhaustion and heat cramps are likely. Heatstroke could follow extended physical effort.
Data suggests that the heat index is set for environments in shade and with a light wind. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', shows a temperature sensation when both heat and moisture conditions are combined. 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. Considering the impact of direct sunlight, it's possible for the heat index to surge by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Typically, young kids are at a higher risk than adults since they sweat less. Also, the larger skin surface in proportion to their small bodies and the heightened heat production due to their active nature adds to their vulnerability.
One way the human body deals with excessive warmth is by perspiring and allowing sweat to evaporate. Higher relative humidity impedes evaporation, thus reducing heat dispersion from the body, culminating in a sensation of overheating. When body temperature rises due to excess heat gain beyond its removal capability, one might experience heat-related disorders.

Humidity

The average relative humidity in April is 73%.

Rainfall

In Polonnaruwa, during April, the rain falls for 23.6 days and regularly aggregates up to 103mm (4.06") of precipitation. In Polonnaruwa, Sri Lanka, during the entire year, the rain falls for 196.8 days and collects up to 943mm (37.13") of precipitation.

Daylight

In Polonnaruwa, the average length of the day in April is 12h and 18min.
On the first day of the month, sunrise is at 06:03 and sunset at 18:15. On the last day of April, in Polonnaruwa, sunrise is at 05:51 and sunset at 18:15 +0530.

Sunshine

The average sunshine in April is 10.1h.

UV index

February through October, with an average maximum UV index of 7, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for the ordinary person.
Note: In April, a daily UV index of 7 turns into the following recommendations:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. UV radiation from the sun is at its strongest between 10 a.m. and 4 p.m. Try to limit direct exposure during these hours. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.