September weather forecast
Bukit Timah, Singapore

In September, despite the mercury inching upwards to 30.7°C (87.3°F), Bukit Timah, Singapore commences its transition into the later months of the year. This month marks the end of the driest period of the year as rainfall levels start picking up again. The days are filled with long hours of sunshine and winds blowing at comfortable speeds. Conditions from late morning to early evening are typically warm, perfect for exploring the green spaces in and around the city. The return of rain brings about a refreshing change towards the end of the month.

Temperature

Bukit Timah ushers in September with an average high-temperature of a still tropical 30.7°C (87.3°F), showing a close resemblance to the previous month. The September nights in Bukit Timah show a slight decrease to a mean low-temperature of 25.8°C (78.4°F).

Heat index

Throughout September, the heat index is estimated at a torrid 38°C (100.4°F). Implement more preventive measures, heat cramps and heat exhaustion are probable. Heatstroke might result from extended activity.
Heat index determinations are made taking into account the shade and light air movements. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is a composite of temperature and humidity figures to convey how warm it feels. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. When exposed to direct sunlight, it's possible for the heat index to increase by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Young individuals are typically more threatened than adults due to their reduced perspiration. Also, the larger skin surface proportionate to their small bodies and the increased heat from their activities magnify their risk.
Perspiring is a crucial mechanism for the human body, allowing it to release excessive warmth through evaporating sweat. An upsurge in relative humidity affects normal body cooling mechanisms by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. Heat absorption that surpasses the body's shedding capability can lead to overheating and varying levels of dehydration.

Humidity

In September, the average relative humidity is 74%.

Rainfall

The month with the least rainfall in Bukit Timah is September, when the rain falls for 25.4 days and typically collects 75mm (2.95") of precipitation.

Daylight

The average length of the day in September in Bukit Timah, Singapore, is 12h and 7min.
On the first day of the month, sunrise is at 07:00 and sunset at 19:09. On the last day of September, sunrise is at 06:51 and sunset at 18:57 +08.

Sunshine

With an average of 9h of sunshine, September has the most sunshine of the year.

UV index

January through December, with an average maximum UV index of 7, are months with the highest UV index in Bukit Timah. January through December, with an average maximum UV index of 7, are months with the lowest UV index in Bukit Timah. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for the average person.
Note: The UV index of 7 during September leads to these advisories:
Prevent overexposure. Protection from the sun's harmful effects is needed. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.