September weather forecast
Okanda, Sri Lanka

September, the first month of the autumn in Okanda, is still a tropical month, with an average temperature ranging between max 30.1°C (86.2°F) and min 26°C (78.8°F).

Temperature

September's presence records an average high-temperature of a still tropical 30.1°C (86.2°F), closely mirroring August's climate. Okanda sustains a near constant temperature throughout September, with nighttime averages of 26°C (78.8°F).

Heat index

In September, the average heat index is calculated to be a very hot 37°C (98.6°F). Ensure additional precautions, heat exhaustion and heat cramps may be expected. Heatstroke could occur from sustained activity.
Be informed that the heat index values are oriented around shady conditions and gentle breezes. Exposure to the direct sun could elevate the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', takes into account both air temperature and humidity to illustrate what people actually feel. One's perception of temperature is subjective, varying based on their activity and individual heat perception, influenced by factors like wind, clothing, and metabolic variations. Taking into account that direct sunlight can boost the heat effect, the heat index may rise by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young children are more at risk than adults since they tend to sweat less. Moreover, their large skin surface in proportion to their small bodies and the high heat production due to their activities contribute to their vulnerability.
Sweat evaporation plays a crucial role in cooling the human body, a process enabled by perspiration. An increase in relative humidity hinders the body's normal cooling function by reducing evaporation, thereby decreasing the rate of body cooling and enhancing the sense of warmth. Exceeding the body's heat disposal threshold results in a rise in body temperature and potential thermal disorders.

Humidity

The average relative humidity in September is 75%.

Rainfall

In Okanda, in September, it is raining for 14.4 days, with typically 48mm (1.89") of accumulated precipitation. In Okanda, Sri Lanka, during the entire year, the rain falls for 192.9 days and collects up to 942mm (37.09") of precipitation.

Daylight

The average length of the day in September in Okanda, Sri Lanka, is 12h and 10min.
On the first day of September in Okanda, sunrise is at 05:55 and sunset at 18:10. On the last day of the month, sunrise is at 05:50 and sunset at 17:54 +0530.

Sunshine

In September, the average sunshine is 10.7h.

UV index

The months with the highest UV index are January through September, November and December, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: The daily high UV index of 7 during September translates into the following recommendations:
Fend off overexposure. Sun protection is vital. 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. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.