September weather forecast
Bopitiya, Sri Lanka

September, the first month of the autumn in Bopitiya, is also a moderately hot month, with an average temperature fluctuating between 25.2°C (77.4°F) and 29.4°C (84.9°F).

Temperature

The ushering in of September brings an average high-temperature of a still moderately hot 29.4°C (84.9°F), closely mirroring the 29.3°C (84.7°F) of August. Bopitiya, in the month of September, notes an average low temperature of 25.2°C (77.4°F), indicating a small decrease from the daytime highs.

Heat index

September's heat index is computed to be a very hot 36°C (96.8°F). Take greater precautions, heat exhaustion and heat cramps may be expected. Heatstroke could result from lengthy activity.
When referencing the heat index, its values are suitable for shady environments and light breezes. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. A person's impression of weather can be swayed by numerous aspects, among them metabolic variations, pregnancy, and activity levels. Under direct sun rays, the felt temperature might be heightened, with the heat index increasing by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Young ones often do not realize the necessity to rest and replenish their fluids. Thirst is a delayed indication of dehydration - keeping hydrated, particularly in prolonged physical activity, is crucial.
The physiological way the human body responds to excessive heat is by inducing perspiration, using sweat evaporation as a cooling mechanism. With an abundance of moisture present in the air, the process of evaporation becomes less effective, and the body fails to cool down as it should, leading to the sensation of overheating. Elevated heat gain compared to the body's release capability poses risks of dehydration and potential overheating.

Humidity

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

Rainfall

In Bopitiya, in September, it is raining for 24.8 days, with typically 192mm (7.56") of accumulated precipitation. In Bopitiya, during the entire year, the rain falls for 265.8 days and collects up to 1783mm (70.2") of precipitation.

Daylight

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

Sunshine

In September, the average sunshine is 7.5h.

UV index

The months with the highest UV index in Bopitiya are January through April, July, September, November and December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In September, the maximum UV index of 7 suggests this advice:
Embrace precautions and observe sun safety norms. Evasion of sunburn is a necessity. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.