September weather forecast
Yakkaduwa, Sri Lanka

The first month of the autumn, September, is also a moderately hot month in Yakkaduwa, Sri Lanka, with an average temperature varying between 25.2°C (77.4°F) and 29.5°C (85.1°F).

Temperature

With the advent of September, Yakkaduwa experiences an average high-temperature of a still warm 29.5°C (85.1°F), mirroring a close resemblance to the previous month. September introduces a small decrease to a nighttime average of 25.2°C (77.4°F) in Yakkaduwa, Sri Lanka.

Heat index

Throughout September, the heat index is evaluated at a sweltering 36°C (96.8°F). Incorporate additional safety actions, heat cramps and heat exhaustion are possible. Long-term activity may induce heatstroke.
Realize that the values for the heat index are set for shaded places and light winds. The heat index values could be amplified by up to 15 Fahrenheit (8 Celsius) degrees in direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', blends air temperature and moisture content to represent the felt temperature to humans. 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. 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 highly critical to babies and toddlers. Children often fail to understand the importance of rest and rehydration. Thirst is a late manifestation of dehydration - hence, it is crucial to stay hydrated, especially during ongoing physical activities.
Evaporating sweat, thanks to perspiration, acts as a natural air conditioner for the human body. Elevated relative humidity disrupts typical body cooling by reducing the evaporation rate, consequently decreasing the body's cooling rate and enhancing the feeling of heat. As the body gains more heat than it can dissipate, there's a risk of increasing temperatures and resultant overheating.

Humidity

In September, the average relative humidity in Yakkaduwa is 81%.

Rainfall

In Yakkaduwa, Sri Lanka, during September, the rain falls for 24.4 days and regularly aggregates up to 153mm (6.02") of precipitation. Throughout the year, there are 265.4 rainfall days, and 1744mm (68.66") of precipitation is accumulated.

Daylight

In Yakkaduwa, the average length of the day in September is 12h and 10min.
On the first day of September, sunrise is at 06:02 and sunset at 18:17. On the last day of the month, sunrise is at 05:58 and sunset at 18:02 +0530.

Sunshine

In Yakkaduwa, Sri Lanka, the average sunshine in September is 7.7h.

UV index

January through April, July, September, November and December, with an average maximum UV index of 7, are months with the highest UV index in Yakkaduwa. A UV Index estimate of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for average individuals.
Note: The maximum UV index of 7 during September translates into these guidelines:
Employ safeguards and advocate sun safety protocols. Shielding against skin and eye damage is crucial. Remember that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. Make an effort to avoid direct sun exposure during these hours. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.