September weather forecast
Díli, East Timor

Given its proximity to the equatorial line, Díli retains its warm climate in September, but the city observes a rise in both rainfall and humidity. The amount of recorded rainfall is 9mm (0.35"), up from August's low levels. Compared with the slightly cooler October, September sees stable sea and air temperature. Despite the small amount of increased rainfall, the city continues to enjoy many hours of daylight and sunshine. Therefore, a visit to Díli in September can still include plenty of opportunities to experience the city's tropical charm.

Temperature

September in Díli notes an average high-temperature of a still hot 30.3°C (86.5°F), subtly differing from August's 30.1°C (86.2°F). Throughout September in Díli, East Timor, a steady low-temperature average of 20.5°C (68.9°F) is noted.

Heat index

For September, the heat index is computed to be a sweltering 36°C (96.8°F). Exercise extra preventive actions, heat cramps and heat exhaustion are plausible. Continuous activity could result in heatstroke.
Bear in mind that the heat index values are determined for shaded areas and light breezes. Being exposed to direct sunshine might trigger a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. In direct sunlight, the heat's impact can be heightened, potentially leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young ones are generally more prone to risk than adults due to their reduced ability to sweat. Their large skin surface area relative to their diminutive bodies and elevated heat production from their activities further enhance this risk.
Perspiration, which is the evaporation of sweat, is a primary way the human body manages and dispels excessive warmth. With a high level of moisture in the air, the evaporation process becomes less efficient, preventing the body from cooling down efficiently and resulting in a sensation of overheating. Exceeding the body's heat disposal threshold results in a rise in body temperature and potential thermal disorders.

Humidity

In Díli, East Timor, the average relative humidity in September is 71%.

Rainfall

September is the month with the least rainfall. Rain falls for 1 days and accumulates 9mm (0.35") of precipitation.

Sea temperature

In Díli, East Timor, the average seawater temperature in September is 28°C (82.4°F).
Note: For activities such as swimming and diving, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as particularly pleasant and satisfying for prolonged periods without feeling uneasy.

Daylight

In Díli, the average length of the day in September is 12h and 4min.
On the first day of September in Díli, sunrise is at 06:39 and sunset at 18:36. On the last day of the month, sunrise is at 06:22 and sunset at 18:32 +09.

Sunshine

The months with the most sunshine in Díli, East Timor, are September and October, with an average of 9.6h of sunshine.

UV index

The months with the highest UV index in Díli, East Timor, are January through April, August through December, with an average maximum UV index of 12. A UV Index estimate of 11, and higher, represents an extreme threat to health from unsafe exposure to UV radiation for the average person.
Note: A maximum high UV index of 12 in September translates into the following recommendations:
Implement every essential safety step. Individuals with fair skin might receive burns in less than 5 minutes. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Broad-spectrum sunscreen with an SPF of 30 or more should be applied liberally every two hours and directly after outdoor activities or swimming. Alert! Sand and water increase UV exposure due to their reflective properties.