September weather forecast
Achchankulam, Sri Lanka

The first month of the autumn, September, is also a moderately hot month in Achchankulam, Sri Lanka, with an average temperature fluctuating between 27°C (80.6°F) and 29.9°C (85.8°F).

Temperature

The onset of September marks an average high-temperature of a still moderately hot 29.9°C (85.8°F), hardly differing from August's 29.8°C (85.6°F). In Achchankulam, the month of September records an average minimum temperature of 27°C (80.6°F), a slight dip from the daily highs.

Heat index

September's mean heat index is evaluated at a very hot 37°C (98.6°F). Incorporate additional preventive steps, heat exhaustion and heat cramps are possible. Long-lasting activity may cause heatstroke.
Note that heat index values are valued for light wind and location in the shade. Heat index values may rise by up to 15 Fahrenheit (8 Celsius) degrees when exposed to direct sunlight.
Note: The heat index, also known as 'real feel' or 'feels like', determines the feeling of heat when you account for the relative humidity. The effect of weather is individual, with a variety of people experiencing it differently due to distinctions in body mass, height, and level of activity. It is important to note that direct sunlight can intensify the weather impact, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. In general, younger individuals are at greater risk than adults because they tend to sweat less. Also, having a larger skin surface to body size ratio and greater heat production due to their active behavior contribute to this danger.
The body's self-cooling mechanism is rooted in perspiration, where evaporating sweat cools down excessive warmth. Increased relative humidity slows down evaporation, thereby decreasing the rate of heat removal from the body, culminating in a sensation of overheating. Heat-related challenges, like dehydration, can be anticipated when body heat isn't managed effectively.

Humidity

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

Rainfall

In Achchankulam, during September, the rain falls for 15.5 days and regularly aggregates up to 45mm (1.77") of precipitation. Throughout the year, in Achchankulam, Sri Lanka, there are 181.2 rainfall days, and 849mm (33.43") 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 06:01 and sunset at 18:18. On the last day of September, in Achchankulam, sunrise is at 05:58 and sunset at 18:01 +0530.

Sunshine

In Achchankulam, the average sunshine in September is 9.7h.

UV index

The months with the highest UV index in Achchankulam are January through October and December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: In September, the average maximum UV index of 7 translates into the following recommendations:
Undertake protective measures and comply with sun safety rules. Shielding against skin and eye damage is essential. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.