September weather forecast
Jerudong, Brunei

September unveils a minor slide in high temperatures, standing at a comfortable 30.8°C (87.4°F). Rainfall volume levels show a downward trend compared to the previous months. This month also records a consistent daylight duration similar to August. The wind speed remains virtually the same, contributing to a seamless transition from August to September. With mild alterations, September maintains an almost identical climatic tapestry.

Temperature

Jerudong sees the arrival of September with an average high-temperature of a still hot 30.8°C (87.4°F), indicating a subtle variation from August. Night temperatures during September in Jerudong experience a slight downturn, averaging a moderately hot 25.8°C (78.4°F).

Heat index

For September, the heat index is calculated to be a fiery hot 39°C (102.2°F). Implement heightened safety measures - risk of heat exhaustion and heat cramps is increased. Prolonged activity may result in heatstroke.
Heat index evaluations are typically in the context of light winds and shaded environments. The heat index has the potential to rise by 15 Fahrenheit (8 Celsius) degrees with direct sunshine exposure.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. Given the impact of direct sunlight, it's noteworthy that the felt temperature can rise by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Children often overlook the necessity for resting and fluid replenishment. Thirst is a late sign of dehydration - thus, it is critical to stay hydrated, especially during extended periods of physical activities.
The natural cooling mechanism in humans involves perspiration, where the evaporation of sweat balances out excessive warmth. In the presence of elevated relative humidity, the evaporation rate decreases. This reduction leads to increased body heat retention compared to conditions of dry air. Overheating dangers loom when the body's heat release mechanisms are overshadowed by excessive gain.

Humidity

The months with the lowest humidity are August and September, with an average relative humidity of 75%.

Rainfall

In Jerudong, Brunei, in September, it is raining for 25.9 days, with typically 113mm (4.45") of accumulated precipitation. Throughout the year, there are 310.9 rainfall days, and 1693mm (66.65") of precipitation is accumulated.

Daylight

The average length of the day in September in Jerudong is 12h and 9min.
On the first day of September, sunrise is at 06:14 and sunset at 18:26. On the last day of the month, sunrise is at 06:08 and sunset at 18:12 +08.

Sunshine

The month with the most sunshine is September, with an average of 9h of sunshine.

UV index

January through December, with an average maximum UV index of 7, are months with the highest UV index. The months with the lowest UV index are January through December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: The average daily UV index of 7 in September transforms into the following instructions:
Steer clear of overexposure. Fair-skinned individuals can be scorched in less than 20 minutes. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.