September weather forecast
Aswedduma, Sri Lanka

September, the first month of the autumn in Aswedduma, is still a warm month, with an average temperature fluctuating between 29.5°C (85.1°F) and 21.1°C (70°F).

Temperature

The advent of September brings an average high-temperature of a still moderately hot 29.5°C (85.1°F), exhibiting minor difference from the previous month. Aswedduma's temperature drops to an average low of 21.1°C (70°F) during the nights of September.

Heat index

September's mean heat index is computed to be a sweltering 35°C (95°F). Heightened precautions are necessary, heat cramps and heat exhaustion are potential risks. Continuous activity could lead to heatstroke.
In the scope of the heat index, its values resonate with shade and light wind conditions. Heat index values have the potential to be boosted by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is an estimation of the warmth sensation when considering humidity levels. This impact is subjective, influenced by the person's physical activity and individual heat perception, affected by factors including wind, attire, and metabolic differences. It is essential to realize that direct sunlight can escalate the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. 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.
The evaporation of sweat is a natural cooling mechanism of the human body, facilitated by perspiration. Heightened relative humidity interferes with the body's usual cooling mechanism by reducing evaporation, subsequently decreasing the body's cooling rate and increasing the sensation of heat. Overheating and dehydration threats arise when heat gain goes beyond what the body can comfortably shed.

Humidity

The average relative humidity in September in Aswedduma is 77%.

Rainfall

In September, in Aswedduma, Sri Lanka, the rain falls for 23.4 days. Throughout September, 118mm (4.65") of precipitation is accumulated. Throughout the year, in Aswedduma, there are 278.4 rainfall days, and 1466mm (57.72") of precipitation is accumulated.

Daylight

In September, the average length of the day is 12h and 10min.
On the first day of the month, sunrise is at 06:00 and sunset at 18:16. On the last day of September, sunrise is at 05:56 and sunset at 18:00 +0530.

Sunshine

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

UV index

The months with the highest UV index in Aswedduma are January through September, November and December, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: In September, a daily UV index of 6 turns into the following recommendations:
Resist extreme sun exposure. Guarding against solar damage is essential. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.