April weather forecast
Santhiveli, Sri Lanka

April, the same as March, in Santhiveli, Sri Lanka, is another tropical spring month, with temperature in the range of an average low of 25.9°C (78.6°F) and an average high of 31.8°C (89.2°F).

Temperature

As Santhiveli welcomes April, the average high-temperature is noted at a still hot 31.8°C (89.2°F), closely aligning with the preceding month. Throughout April, Santhiveli registers a consistent average low-temperature of 25.9°C (78.6°F).

Heat index

The heat index value for April is calculated to be a blisteringly hot 42°C (107.6°F). Take extra safety measures to prevent heat exhaustion and heat cramps. Heatstroke could follow lengthy activity.
Heat index guidelines indicate values are for light wind scenarios and shaded regions. Exposure to direct sunlight may make the heat index values climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is a composite of temperature and humidity figures to convey how warm it feels. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. Keep in mind that direct sunshine exposure can amplify the weather's effects, possibly increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Children commonly overlook the importance of rest and fluid replenishment. Thirst, being a delayed sign of dehydration, emphasizes the need to keep hydration up, especially during lengthy physical activities.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. When relative humidity is on the rise, it curtails evaporation, thereby reducing the heat elimination from the body and causing the feeling of being excessively hot. Rising body temperatures due to excess heat retention could signify impending heat disorders.

Humidity

In Santhiveli, Sri Lanka, the average relative humidity in April is 75%.

Rainfall

In Santhiveli, in April, during 19.1 rainfall days, 57mm (2.24") of precipitation is typically accumulated. In Santhiveli, during the entire year, the rain falls for 237.8 days and collects up to 1259mm (49.57") of precipitation.

Daylight

The average length of the day in April is 12h and 18min.
On the first day of April, sunrise is at 06:01 and sunset at 18:13. On the last day of the month, sunrise is at 05:48 and sunset at 18:12 +0530.

Sunshine

The average sunshine in April is 11.2h.

UV index

January through October, with an average maximum UV index of 7, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The UV index of 7 during April translates into the following guidance:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. The Sun's UV radiation is at its strongest between the hours of 10 a.m. and 4 p.m. Minimize direct exposure to the sun during this period. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.