September weather forecast
Kandegedara, Sri Lanka

The first month of the autumn, September, is still a warm month in Kandegedara, Sri Lanka, with temperature in the range of an average high of 29.4°C (84.9°F) and an average low of 21°C (69.8°F).

Temperature

Entering September, the average high-temperature is recorded at a still warm 29.4°C (84.9°F), exhibiting a minimal shift from August's 29.2°C (84.6°F). An average nighttime temperature of 21°C (69.8°F) is observed in Kandegedara during September.

Heat index

For September, the heat index is calculated to be a fiery hot 35°C (95°F). Exercise increased caution, heat cramps and heat exhaustion are potential hazards. Continuous activity could lead to heatstroke.
Heat index guidelines indicate values are for light wind scenarios and shaded regions. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is a measure of how hot it feels when the actual air humidity is factored in. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. By being directly under the sun, it's possible for the felt temperature to increase by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. 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.
Evaporation of sweat is the main factor behind the cooling effect of perspiration in the human body. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. When the body's heat gain surpasses its removal capacity, body temperature starts to climb, leading to potential heat-related ailments.

Humidity

In Kandegedara, the average relative humidity in September is 77%.

Rainfall

In Kandegedara, Sri Lanka, during September, the rain falls for 23.9 days and regularly aggregates up to 129mm (5.08") of precipitation. Throughout the year, in Kandegedara, there are 278.9 rainfall days, and 1477mm (58.15") of precipitation is accumulated.

Daylight

In Kandegedara, the average length of the day in September is 12h and 10min.
On the first day of the month, sunrise is at 06:01 and sunset at 18:16. On the last day of September, sunrise is at 05:57 and sunset at 18:00 +0530.

Sunshine

In Kandegedara, the average sunshine in September is 9.9h.

UV index

January through September, November and December, with an average maximum UV index of 6, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: The maximum UV index of 6 during September leads to these instructions:
Conform to measures and uphold sun safety traditions. Warding off skin and eye harm is necessary. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.