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

Díli signifies an average high-temperature of a still hot 30.3°C (86.5°F) in September, closely mirroring the 30.1°C (86.2°F) of August. An average temperature of 20.5°C (68.9°F) is recorded during the nights in September.

Heat index

September's average heat index is appraised at a torrid 36°C (96.8°F). Incorporate additional safety actions, heat cramps and heat exhaustion are possible. Long-term activity may induce heatstroke.
In reference to the heat index, it's for places in shade and with a slight wind. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. With the sun shining directly, it's crucial to understand that it can increase the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Typically, young kids are at a higher risk than adults since they sweat less. Also, the larger skin surface in proportion to their small bodies and the heightened heat production due to their active nature adds to their vulnerability.
In the face of high temperatures, the human body's reflex is to perspire, leveraging sweat evaporation for cooling. Greater relative humidity lessens the rate of evaporation, thus decreasing the body's heat dispersal, which gives rise to a sensation of overheating. Heat disorders may be on the horizon when body temperatures rise from inadequate heat management.

Humidity

In September, the average relative humidity is 71%.

Rainfall

The month with the least rainfall is September, when the rain falls for 1 days and typically collects 9mm (0.35") of precipitation.

Sea temperature

In September, the average sea temperature is 28°C (82.4°F).
Note: Water temperature ranging between 25°C (77°F) and 29°C (84.2°F) is considered very warm and pleasing for everyone. It allows for enjoyable water activities over extended periods without discomfort.

Daylight

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

Sunshine

September and October, with an average of 9.6h of sunshine, are months with the most sunshine.

UV index

The months with the highest UV index are January through April, August through December, with an average maximum UV index of 12. A UV Index reading of 11, and higher, represents an excessive health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: The UV index of 12 during September leads to these advisories:
Implement all key precautions. Warding off sun damage is critical. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Every two hours, apply and reapply an SPF 30+ broad-spectrum sunscreen, especially after swimming or engaging in outdoor activities. Be vigilant! The Sun's UV rays get a boost from sand and water reflections.