April weather forecast
Sirimalwatta, Sri Lanka

April, the same as March, in Sirimalwatta, Sri Lanka, is another hot spring month, with an average temperature ranging between max 31.2°C (88.2°F) and min 20.8°C (69.4°F).

Temperature

April's presence marks an average high-temperature of a still tropical 31.2°C (88.2°F), subtly varied from March's 31.5°C (88.7°F). The average temperature during April nights is registered at an agreeable 20.8°C (69.4°F).

Heat index

Throughout April, the heat index is evaluated at an extremely hot 41°C (105.8°F). Extra safeguards are necessary to prevent heat exhaustion and heat cramps. Prolonged activity might cause heatstroke.
Be advised, the heat index considers values for conditions in shade and with a light breeze. A rise in the heat index by 15 Fahrenheit (8 Celsius) degrees may result from direct sunlight exposure.
Note: The heat index, also known as 'real feel' or 'felt air temperature', marries air temperature and humidity to produce a value illustrating perceived warmth. The impact of weather is individual, with diverse individuals experiencing it differently due to variations in body mass, height, and activity levels. Awareness of direct sun exposure is crucial as it has the potential to heighten the weather's effects, pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.
The innate cooling system of the human body revolves around perspiration, with the evaporation of sweat being central to this process. During conditions of high air temperature and humidity (high heat index), the body's ability to perspire is inhibited, increasing the sensation of warmth. Heat disorders may be on the horizon when body temperatures rise from inadequate heat management.

Humidity

The average relative humidity in April is 79%.

Rainfall

In Sirimalwatta, in April, during 27 rainfall days, 152mm (5.98") of precipitation is typically accumulated. In Sirimalwatta, Sri Lanka, during the entire year, the rain falls for 278.4 days and collects up to 1466mm (57.72") of precipitation.

Daylight

In Sirimalwatta, Sri Lanka, the average length of the day in April is 12h and 17min.
On the first day of the month, sunrise is at 06:05 and sunset at 18:17. On the last day of April, sunrise is at 05:53 and sunset at 18:15 +0530.

Sunshine

In April, the average sunshine is 9.4h.

UV index

The months with the highest UV index in Sirimalwatta are January through September, November and December, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for average individuals.
Note: The maximum daily UV index, 6 in April, converts into the following recommendations:
Persist with precautions and heed sun safety advice. Prevention of sunburn is compulsory. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.