September weather forecast
Vellaveli, Sri Lanka

September, the first month of the autumn in Vellaveli, is also a hot month, with an average temperature fluctuating between 25.7°C (78.3°F) and 31.8°C (89.2°F).

Temperature

Entering September, the average high-temperature is recorded at a still tropical 31.8°C (89.2°F), exhibiting a minimal shift from August's 32.3°C (90.1°F). In Vellaveli, an average nighttime temperature of 25.7°C (78.3°F) is expected during September.

Heat index

The average heat index in September is calculated to be a scorching 41°C (105.8°F). Extra safeguards are necessary to prevent heat exhaustion and heat cramps. Prolonged activity might cause heatstroke.
In the scope of the heat index, its values resonate with shade and light wind conditions. With exposure to direct sunshine, the heat index could climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. An individual's perception of weather can be affected by a variety of elements including metabolic differences, being pregnant, and their level of physical exertion. By being directly under the sun, it's possible for the felt temperature to increase by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Children often lack awareness of the importance of taking breaks and rehydrating. The feeling of thirst is a late indication of dehydration, so maintaining hydration, especially during long periods of physical activity, is critical.
When the body gets too warm, it perspires, leading to sweat evaporation which cools it down. Elevated relative humidity diminishes evaporation, thereby reducing the body's ability to shed heat and creating a feeling of being too warm. Should the body fail to balance its heat gain, the escalating temperature poses health challenges.

Humidity

In September, the average relative humidity is 72%.

Rainfall

In Vellaveli, during September, the rain falls for 22 days and regularly aggregates up to 81mm (3.19") of precipitation. In Vellaveli, 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 September in Vellaveli, Sri Lanka, is 12h and 10min.
On the first day of the month, sunrise is at 05:55 and sunset at 18:10. On the last day of September, sunrise is at 05:51 and sunset at 17:54 +0530.

Sunshine

In Vellaveli, the average sunshine in September is 10.7h.

UV index

The months with the highest UV index in Vellaveli are January through October, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for the average person.
Note: In September, a daily UV index of 7 turns into the following recommendations:
Incorporate safeguards and honour sun safety principles. Protection from skin and eye damage is obligatory. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.