April weather forecast
Heerassagala, Sri Lanka

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

Temperature

The shift into April records an average high-temperature of a still hot 31.2°C (88.2°F), subtly varied from March's 31.5°C (88.7°F). During April, Heerassagala records a consistent average nighttime temperature of 20.8°C (69.4°F).

Heat index

The heat index value during April is evaluated at a blistering 41°C (105.8°F). More preventive actions are needed, risk of heat exhaustion and heat cramps is significant. Prolonged activity may trigger heatstroke.
In the scope of the heat index, its values resonate with shade and light wind conditions. An exposure to direct sunlight may lift the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', blends air temperature and moisture content to represent the felt temperature to humans. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. Consider the sun's direct rays and their impact; they can potentially increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Kids often lack the knowledge about the necessity to take breaks and consume liquids. Thirst, as a late symptom of dehydration, necessitates the maintenance of hydration, particularly during enduring physical activities.
The primary way humans combat excessive warmth is by perspiring, letting sweat evaporate and cool the body. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. As body temperatures escalate without effective heat release, one might face dehydration threats.

Humidity

In April, the average relative humidity in Heerassagala is 79%.

Rainfall

In Heerassagala, in April, it is raining for 27 days, with typically 152mm (5.98") of accumulated precipitation. Throughout the year, there are 278.4 rainfall days, and 1466mm (57.72") of precipitation is accumulated.

Daylight

In Heerassagala, 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 18:16 +0530.

Sunshine

In April, the average sunshine is 9.4h.

UV index

January through September, November and December, with an average maximum UV index of 6, are months with the highest UV index in Heerassagala, Sri Lanka. A UV Index estimate of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The daily high UV index of 6 in April translates into this advice:
Use measures and accept sun safety conventions. Guarding against skin and eye trauma is of high priority. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.