April weather forecast
Rathkarawwa, Sri Lanka

April, like March, is another hot spring month in Rathkarawwa, Sri Lanka, with an average temperature varying between 26°C (78.8°F) and 31.1°C (88°F).

Temperature

April, with its average high-temperature of 31.1°C (88°F) and an average low-temperature of 26°C (78.8°F), holds the record as the warmest month.

Heat index

For most parts of April, the heat index is calculated to be a blistering 40°C (104°F). Extra precautions are necessary, heat cramps and heat exhaustion are plausible outcomes. Extended activity could lead to heatstroke.
Keep in mind the heat index values are meant for areas in shade and with light wind. 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 'felt air temperature', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. Additional elements including metabolic differences, the level of physical activity, and attire have a role in shaping the individual's temperature perception. Keep aware, the sun, when shining directly, can intensify the heat experience, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.
Evaporating sweat, thanks to perspiration, acts as a natural air conditioner for the human body. In the presence of abundant moisture in the atmosphere, the cooling process through evaporation is hindered, causing the body to feel excessively warm. If heat absorption exceeds the body's cooling ability, body temperature can elevate, resulting in potential thermal illnesses.

Humidity

In Rathkarawwa, the average relative humidity in April is 77%.

Rainfall

In Rathkarawwa, Sri Lanka, in April, during 22.8 rainfall days, 109mm (4.29") of precipitation is typically accumulated. Throughout the year, there are 192.9 rainfall days, and 942mm (37.09") of precipitation is accumulated.

Daylight

In April, the average length of the day is 12h and 17min.
On the first day of the month, sunrise is at 06:04 and sunset at 18:15. On the last day of April, sunrise is at 05:52 and sunset at 18:14 +0530.

Sunshine

In Rathkarawwa, the average sunshine in April is 10.2h.

UV index

January through September, November and 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 vulnerability from unsafe exposure to UV radiation for average individuals.
Note: A maximum daily UV index of 7 during April morphs into the following directions:
Implement preventive steps and embrace sun safety standards. Protection from skin and eye distress is compulsory. Limit your exposure to the sun's UV radiation, which is strongest between 10 a.m. and 4 p.m., and note that parasols or canopies may not provide full sun protection. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.