September weather forecast
Ethul Kotte, Sri Lanka

The first month of the autumn, September, is also a moderately hot month in Ethul Kotte, Sri Lanka, with an average temperature varying between 29.1°C (84.4°F) and 24.9°C (76.8°F).

Temperature

The beginning of September records an average high-temperature of a still moderately hot 29.1°C (84.4°F), almost echoing the conditions of the previous month. Ethul Kotte upholds a consistent average temperature of 24.9°C (76.8°F) throughout the nights of September.

Heat index

The average heat index in September is evaluated at a torrid 35°C (95°F). Adopt additional preventive measures, heat cramps and heat exhaustion are potential outcomes. Prolonged activity may trigger heatstroke.
Given the heat index, its values are aligned with shaded sites and gentle winds. Direct sunshine exposure could raise heat index values by as much as 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', unifies temperature and humidity readings to offer a comprehensive feel of warmth. The individual's impression of temperature can be affected by numerous factors such as metabolic variations, physical exertion, and attire. You should know that direct sun exposure can heighten weather effects, potentially elevating the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Children frequently do not understand the need for recuperation and hydration. Thirst, being a late manifestation of dehydration, underlines the need to hydrate frequently, especially when engaging in prolonged physical exercises.
When temperatures rise, the human body turns to perspiration, using the cooling power of evaporating sweat. Augmented relative humidity impedes typical body cooling mechanisms by lowering the evaporation rate, resulting in decreased body cooling and an amplified perception of heat. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

The average relative humidity in September is 81%.

Rainfall

In Ethul Kotte, Sri Lanka, in September, during 26.9 rainfall days, 206mm (8.11") of precipitation is typically accumulated. In Ethul Kotte, during the entire year, the rain falls for 289.4 days and collects up to 2262mm (89.06") of precipitation.

Daylight

In September, the average length of the day is 12h and 10min.
On the first day of September in Ethul Kotte, sunrise is at 06:02 and sunset at 18:17. On the last day of the month, sunrise is at 05:58 and sunset at 18:02 +0530.

Sunshine

In Ethul Kotte, Sri Lanka, the average sunshine in September is 7.4h.

UV index

The months with the highest UV index in Ethul Kotte, Sri Lanka, are January through April, July, September, November and December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: The maximum UV index, 7 during September, leads to the following recommendations:
Fend off overexposure. Sun protection is vital. Attempt to stay under shade and limit exposure to the Sun between 10 a.m. and 4 p.m., when UV radiation is at its peak. Remember, devices such as parasols or canopies might not provide complete sun protection. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.