September weather forecast
Kattankudy, Sri Lanka

The first month of the autumn, September, is still a tropical month in Kattankudy, Sri Lanka, with an average temperature fluctuating between 25.7°C (78.3°F) and 31.8°C (89.2°F).

Temperature

September's advent denotes a minor fluctuation in the average high-temperature to a still tropical 31.8°C (89.2°F) from August's 32.3°C (90.1°F). Kattankudy usually reports an average low-temperature of 25.7°C (78.3°F) during the month of September.

Heat index

September's mean heat index is calculated to be an extremely hot 41°C (105.8°F). Exercise increased caution, heat cramps and heat exhaustion are potential hazards. Continuous activity could lead to heatstroke.
Understand that the heat index values take into account shaded locations and mild winds. The heat index values could be amplified by up to 15 Fahrenheit (8 Celsius) degrees in direct sunlight.
Note: The heat index, also known as 'real feel' or 'feels like', combines air temperature and relative humidity to represent a human perceived temperature equivalent. The individual's temperature perception can be influenced by numerous factors such as metabolic variations, physical activity, and clothing. Realize that direct exposure to sunlight can augment the felt heat, leading to a potential increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Young children typically face greater hazards than adults because they do not sweat as much. Their larger skin surface in comparison to their little bodies and the high heat production from their active nature compounds their vulnerability.
To offset high temperatures, the human body releases sweat which, upon evaporation, cools it down. An elevated level of relative humidity hinders evaporation, leading to decreased heat elimination from the body, inducing a sensation of excess 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 72%.

Rainfall

In Kattankudy, in September, during 22 rainfall days, 81mm (3.19") of precipitation is typically accumulated. In Kattankudy, during the entire year, the rain falls for 237.8 days and collects up to 1259mm (49.57") of precipitation.

Daylight

In Kattankudy, Sri Lanka, the average length of the day in September 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

The average sunshine in September in Kattankudy is 10.7h.

UV index

January through October, with an average maximum UV index of 7, are months with the highest UV index in Kattankudy. A UV Index reading of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The UV index of 7 during September leads to these advisories:
Apply measures and align with sun safety principles. Safeguarding against skin and eye injury is pivotal. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.