September weather forecast
Alampil, Sri Lanka

The first month of the autumn, September, is still a tropical month in Alampil, Sri Lanka, with an average temperature ranging between min 24.8°C (76.6°F) and max 32.6°C (90.7°F).

Temperature

The transition into September shows a subtle variation to a still tropical 32.6°C (90.7°F) from August's 32.8°C (91°F) in the average high-temperature. September witnesses an average low-temperature hovering around a warm 24.8°C (76.6°F).

Heat index

September's average heat index is computed to be an extremely hot 43°C (109.4°F). Vigilance: Heat cramps and heat exhaustion are likely. The likelihood of heatstroke increases with continued activity.
The standards for the heat index are set for locations in shade and under light breezes. 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 'real feel' or 'feels like', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. 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 are particularly important for children. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.
To combat high temperatures, the human body perspires and relies on sweat evaporation for cooling. A surge in relative humidity can disrupt the body's normal cooling function by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. Inadequate heat shedding in the face of rising body temperatures hints at potential dehydration risks.

Humidity

July through September, with an average relative humidity of 71%, are the least humid months in Alampil.

Rainfall

In Alampil, in September, during 14 rainfall days, 57mm (2.24") of precipitation is typically accumulated. Throughout the year, there are 199.1 rainfall days, and 893mm (35.16") of precipitation is accumulated.

Daylight

In Alampil, the average length of the day in September is 12h and 11min.
On the first day of the month, sunrise is at 05:57 and sunset at 18:15. On the last day of September, sunrise is at 05:55 and sunset at 17:58 +0530.

Sunshine

In Alampil, the average sunshine in September is 9.6h.

UV index

February through September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: A maximum high UV index of 7 in September translates into the following recommendations:
Avoid overexposure. Fair-skinned individuals can burn in under 20 minutes. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.