September weather forecast
Bintulu, Malaysia

Bintulu’s weather in September signifies a definitive ushering in of the drier spell with an average rainfall of 130mm (5.12"). This lowering rainfall from the August showers correlates with a slight decrease in humidity levels in the city. With sea temperature dipping fractionally to 29.8°C (85.6°F), September remains classified as pleasantly warm. The daytime sunshine continues to illuminate the city heartily, complementing the moderating temperatures. As the month heads to a close, the weather pattern exhibits signs of returning wetter conditions in the offing.

Temperature

September's average high-temperature in Bintulu stands at a still tropical 31°C (87.8°F), showing little deviation from August's 31.2°C (88.2°F). Bintulu experiences a nighttime temperature average of 24.2°C (75.6°F) during September.

Heat index

In September, the average heat index is appraised at a blistering 41°C (105.8°F). Undertake additional precautions, heat cramps and heat exhaustion could happen. Heatstroke could occur from sustained activity.
Note that heat index values are valued for light wind and location in the shade. The heat index has the possibility to be enhanced by 15 Fahrenheit (8 Celsius) degrees when there is direct sun exposure.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is an aggregate value of air's warmth and moisture to show the human-felt temperature. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. With direct sunlight, be aware that it might enhance the heat sensation, raising the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Kids frequently fail to realize the necessity for resting and hydrating. Thirst is an advanced indication of dehydration - hence, maintaining hydration, especially during extended physical activities, becomes essential.
Through perspiration, the body has a natural mechanism to eliminate excessive heat via sweat evaporation. Excessive relative humidity disturbs the body's typical cooling process by reducing evaporation, leading to a decrease in body cooling rate and an increase in the sensation of warmth. Heat absorption that surpasses the body's shedding capability can lead to overheating and varying levels of dehydration.

Humidity

The average relative humidity in September is 79%.

Rainfall

The month with the least rainfall in Bintulu is September, when the rain falls for 26.2 days and typically collects 130mm (5.12") of precipitation.

Sea temperature

In Bintulu, the average seawater temperature in September is 29.8°C (85.6°F).
Note: Water temperatures between 25°C (77°F) and 29°C (84.2°F) are ideal for all water activities, offering enjoyment without causing discomfort over extended periods.

Daylight

In September, the average length of the day in Bintulu is 12h and 8min.
On the first day of September in Bintulu, sunrise is at 6:22 am and sunset at 6:33 pm. On the last day of the month, sunrise is at 6:15 am and sunset at 6:20 pm +08.

Sunshine

September has the most sunshine of the year, with an average of 8.6h of sunshine.

UV index

February through November, with an average maximum UV index of 7, are months with the highest UV index in Bintulu. A UV Index of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for the average person.
Note: The maximum daily UV index, 7 in September, converts into the following recommendations:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Warning! Reflective surfaces like sand and water amplify the Sun's UV radiation.