April weather forecast
Puttalam, Sri Lanka

April in Puttalam is recognized by a noteworthy climb in the average temperature and relative humidity. Compared to March, clouds become slightly more prominent, subtly darkening the sky. Notwithstanding, the amount of sunshine per day remains relatively high, proving it a satisfying time for outdoor exploration. The prevailing winds gradually slow down, maintaining a gentle, refreshing breeze throughout the region. A sharp rise in rainfall to 86mm (3.39") sets April apart, indicating the onset of the monsoon season.

Temperature

With average high temperatures of 31.9°C (89.4°F) and lows of 26.8°C (80.2°F), April is the warmest month in Puttalam.

Heat index

The heat index value during April is computed to be an extremely hot 42°C (107.6°F). Greater safety measures are needed, risk of heat exhaustion and heat cramps is high. Continuous activity might trigger heatstroke.
Research indicates the heat index considers values in shaded locales and with light winds. A rise of up to 15 Fahrenheit (8 Celsius) degrees in the heat index could result from direct sunlight.
Note: The heat index, also known as 'feels like' or 'apparent temperature', provides an understanding of perceived warmth by combining temperature and relative humidity. 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. 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 primarily vital for children. Young ones are generally at greater risk than adults due to their limited sweating ability. In addition, their large skin surface relative to their small bodies and higher heat production from their activities add to their vulnerability.
To combat high temperatures, the human body perspires and relies on sweat evaporation for cooling. When the air contains significant moisture, the efficiency of the evaporation process decreases, preventing the body from cooling down effectively and creating a feeling of overheating. If heat absorption exceeds the body's cooling ability, body temperature can elevate, resulting in potential thermal illnesses.

Humidity

In Puttalam, the average relative humidity in April is 76%.

Rainfall

In Puttalam, in April, during 21.4 rainfall days, 86mm (3.39") of precipitation is typically accumulated. In Puttalam, during the entire year, the rain falls for 221.7 days and collects up to 1071mm (42.17") of precipitation.

Daylight

The average length of the day in April in Puttalam is 12h and 18min.
On the first day of April, sunrise is at 06:08 and sunset at 18:20. On the last day of the month, sunrise is at 05:55 and sunset at 18:20 +0530.

Sunshine

The average sunshine in April in Puttalam is 9.6h.

UV index

January through December, with an average maximum UV index of 7, are months with the highest UV index in Puttalam. The months with the lowest UV index are January through December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: The maximum daily UV index of 7 in April converts into the following recommendations:
Uphold preventive measures and conform to sun safety guidelines. Defending against skin and eye harm is crucial. 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. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.