September weather forecast
Buwelikada, Sri Lanka

September, the first month of the autumn in Buwelikada, is also a moderately hot month, with an average temperature fluctuating between 29.4°C (84.9°F) and 21°C (69.8°F).

Temperature

The arrival of September sees an average high-temperature of a still warm 29.4°C (84.9°F), hardly diverging from August's 29.2°C (84.6°F). During the September nights, an average temperature of 21°C (69.8°F) is observed.

Heat index

The heat index value during September is estimated at a very hot 35°C (95°F). Heightened precautions are necessary, heat cramps and heat exhaustion are potential risks. Continuous activity could lead to heatstroke.
One should consider that heat index numbers are for shaded settings and light wind. A rise in the heat index by 15 Fahrenheit (8 Celsius) degrees may result from direct sunlight exposure.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', gives an indication of how one might feel in terms of heat after considering humidity. The impact of weather is individual, with diverse individuals experiencing it differently due to variations in body mass, height, and activity levels. When in direct sunlight, one should be cautious as it can raise the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Children frequently underestimate the importance of resting and drinking fluids. Thirst is a symptom of advanced dehydration - hence the need to hydrate regularly, especially during protracted physical exercises.
The body's inherent cooling system operates through perspiration, wherein evaporating sweat offsets excessive heat. When the level of relative humidity is elevated, evaporation diminishes, causing more warmth to be retained in the body than in dry air. Heat-related disorders may develop if heat gain in the body overshadows its cooling capacity, leading to elevated temperatures.

Humidity

In Buwelikada, Sri Lanka, the average relative humidity in September is 77%.

Rainfall

In Buwelikada, Sri Lanka, in September, during 23.9 rainfall days, 129mm (5.08") of precipitation is typically accumulated. Throughout the year, there are 278.9 rainfall days, and 1477mm (58.15") of precipitation is accumulated.

Daylight

The average length of the day in September in Buwelikada, Sri Lanka, is 12h and 10min.
On the first day of September, sunrise is at 05:59 and sunset at 18:14. On the last day of the month, sunrise is at 05:55 and sunset at 17:59 +0530.

Sunshine

The average sunshine in September is 9.9h.

UV index

The months with the highest UV index in Buwelikada 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 health vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: A daily high UV index of 6 in September leads to these guidelines:
Persist with precautions and heed sun safety advice. Prevention of sunburn is compulsory. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.