September weather forecastOssu, East Timor

Weather in September

In September, weather conditions continue to uphold the trend set by August. There is a slight increase in rainfall to 4mm (0.16") but weather parameters remain consistently stable and inviting. The region is dominated by long sunshine hours and declining cloud formations, resulting in increased daylight exposure. With temperatures remaining warm and wind conditions stable, the outdoor environment becomes highly desirable. Visibility remains at its peak, allowing locals and tourists to appreciate the scenic beauty of the region.

Temperature

As Ossu, East Timor, welcomes September, the average high-temperature records at a still moderately hot 29.8°C (85.6°F), marking an insignificant deviation from the prior month. Nighttime temperatures hover around an average low of 21.3°C (70.3°F) in September.

Heat index

September's mean heat index is evaluated at a sweltering 35°C (95°F). Ensure additional precautions, heat exhaustion and heat cramps may be expected. Heatstroke could occur from sustained activity.
In reference to the heat index, it's for places in shade and with a slight wind. Direct exposure to sunshine could lead to a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', combines air temperature and relative humidity to represent a human perceived temperature equivalent. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, and metabolic variations. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.
The physiological way the human body responds to excessive heat is by inducing perspiration, using sweat evaporation as a cooling mechanism. In conditions of both high temperature and humidity (a high heat index), sweating is limited and the perception of heat is enhanced. Heat-related disorders may develop if heat gain in the body overshadows its cooling capacity, leading to elevated temperatures.

Humidity

In September, the average relative humidity is 72%.

Rainfall

In Ossu, in September, it is raining for 3.7 days, with typically 4mm (0.16") of accumulated precipitation. Throughout the year, there are 157.3 rainfall days, and 660mm (25.98") of precipitation is accumulated.

Daylight

The average length of the day in September is 12h and 4min.
On the first day of September, sunrise is at 06:36 and sunset at 18:32. On the last day of the month, sunrise is at 06:19 and sunset at 18:29 +09.

Sunshine

The average sunshine in September is 9.4h.

UV index

January through March, September through December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: The maximum UV index, 7 during September, leads to the following recommendations:
Eschew overexposure. Those with light skin may suffer burns in fewer than 20 minutes. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.