September weather forecast
Kotakedeniya, Sri Lanka

The first month of the autumn, September, is still a warm month in Kotakedeniya, Sri Lanka, with an average temperature ranging between max 29.5°C (85.1°F) and min 21.1°C (70°F).

Temperature

Welcoming September, Kotakedeniya notes an average high-temperature of a still moderately hot 29.5°C (85.1°F), nearly consistent with August's 29.2°C (84.6°F). Throughout September, the average low-temperature records at a pleasant 21.1°C (70°F).

Heat index

The average heat index in September is appraised at a very hot 35°C (95°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Consider that heat index readings are for situations in the shade and light wind. The direct sun can potentially cause the heat index to increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', is an aggregate value of air's warmth and moisture to show the human-felt temperature. Factors encompassing physical activity, clothing, and metabolic differences have a role in shaping the individual's impression of temperature. It is noteworthy to mention that direct sunlight exposure can augment the felt temperature, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. 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.
When the body gets too warm, it perspires, leading to sweat evaporation which cools it down. When relative humidity is at high levels, the evaporation rate lessens, causing the body to keep more heat than it would in less humid conditions. With body temperatures on the rise, inefficient heat shedding can lead to dehydration and its associated complications.

Humidity

The average relative humidity in September in Kotakedeniya, Sri Lanka, is 77%.

Rainfall

In Kotakedeniya, in September, it is raining for 23.4 days, with typically 118mm (4.65") of accumulated precipitation. In Kotakedeniya, during the entire year, the rain falls for 278.4 days and collects up to 1466mm (57.72") of precipitation.

Daylight

In September, the average length of the day is 12h and 10min.
On the first day of September, sunrise is at 06:00 and sunset at 18:15. On the last day of the month, sunrise is at 05:55 and sunset at 17:59 +0530.

Sunshine

In Kotakedeniya, the average sunshine in September is 10.3h.

UV index

January through September, November and December, with an average maximum UV index of 6, are months with the highest UV index in Kotakedeniya. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: In September, the maximum UV index of 6 transforms into these recommendations:
Conform to measures and uphold sun safety traditions. Warding off skin and eye harm is necessary. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.