September weather forecast
Bukit Puan, Brunei

September brings a slight decrease in temperature, creating a more balanced warmth. Although it still feels summer, the mercury dips to 32.9°C (91.2°F). A noticeable reduction in rainfall is witnessed, marking it as the driest month with only 100mm (3.94") of rainfall. Parallely, there is a slight increase in the number of rainy days. The calm persistent wind maintains an average speed of 4.8km/h (3mph). The reduced precipitation creates a pleasant atmosphere for travel in Bukit Puan.

Temperature

The transition into September marks the average high-temperature at a still tropical 32.9°C (91.2°F), differing minimally from August's 33.1°C (91.6°F). In Bukit Puan, September is marked by an average low-temperature of 22.9°C (73.2°F).

Heat index

September's heat index is computed to be a blazing hot 47°C (116.6°F). Eyes open: Heat cramps and heat exhaustion are expected. Prolonged exertion could lead to heatstroke.
Research indicates the heat index considers values in shaded locales and with light winds. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', comes about by integrating the temperature readings with the humidity levels. The influence of weather is personal, with varied individuals experiencing it differently due to differences in body mass, stature, and physical exertion levels. Given direct exposure to sunlight, one might experience a rise in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to 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.
To achieve cooling, the human body employs perspiration, relying on the subsequent evaporation of sweat. With excessive moisture in the atmosphere, the effectiveness of the evaporation process is decreased, causing the body to cool down less efficiently, leading to a sensation of overheating. When the heat gained surpasses the body's cooling capacity, temperatures rise, signaling potential health concerns.

Humidity

The months with the lowest humidity are August and September, with an average relative humidity of 78%.

Rainfall

September is the month with the least rainfall. Rain falls for 24.1 days and accumulates 100mm (3.94") of precipitation.

Daylight

The average length of the day in September in Bukit Puan is 12h and 8min.
On the first day of September in Bukit Puan, Brunei, sunrise is at 06:16 and sunset at 18:28. On the last day of the month, sunrise is at 06:09 and sunset at 18:14 +08.

Sunshine

September has the most sunshine of the year in Bukit Puan, with an average of 8.7h of sunshine.

UV index

February through December, with an average maximum UV index of 7, are months with the highest UV index in Bukit Puan. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: In September, a daily maximum UV index of 7 leads to the following instructions:
Dodge overexposure. Fair-skinned people can get singed in less than 20 minutes. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.