September weather forecast
Singapore, Singapore

September marks the transition phase into the final quarter of the year in Singapore. The subtle dip in sea temperature to 29.4°C slightly cools the bathing conditions but retains the inviting warmth familair to this region. Singapore's weather in September carries forward the climate characteristics of August, exhibiting limited change in rainfall, temperature or humidity. The continuous sequence of warm days and mild nights keep the dynamic spirit of the city alive. September offers a stable climate and continues to encourage outdoor activities for locals and tourists.

Temperature

Singapore experiences an average high-temperature of a still tropical 30.9°C in September, mirroring August's climate. Singapore witnesses a consistent average low-temperature of 24.2°C throughout September.

Heat index

The heat index in September is computed to be a blisteringly hot 42°C. Undertake additional precautions, heat cramps and heat exhaustion could happen. Heatstroke could occur from sustained activity.
From a standpoint of the heat index, values pertain to shaded conditions and mild breezes. With exposure to direct sunshine, the heat index could climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', takes into account both air temperature and humidity to illustrate what people actually feel. The individual's impression of temperature can be affected by numerous factors such as metabolic variations, physical exertion, and attire. One's exposure to direct sunlight has the potential to intensify the heat sensation, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Youngsters frequently overlook the need for breaks and fluid intake. Thirst is an advanced sign of dehydration - thereby highlighting the importance of keeping hydrated, particularly during long physical activities.
Evaporating sweat, thanks to perspiration, acts as a natural air conditioner for the human body. When relative humidity is on the rise, it curtails evaporation, thereby reducing the heat elimination from the body and causing the feeling of being excessively hot. If heat absorption exceeds the body's cooling ability, body temperature can elevate, resulting in potential thermal illnesses.

Humidity

In September, the average relative humidity is 83.4%.

Rainfall

In Singapore, in September, it is raining for 14 days, with typically 169mm of accumulated precipitation. Throughout the year, in Singapore, there are 178 rainfall days, and 2343mm of precipitation is accumulated.

Sea temperature

In Singapore, in September, the average water temperature is 29.4°C.
Note: For water activities like swimming, diving, and more, temperatures ranging between 25°C and 29°C offer superior comfort and enjoyment for lengthy durations.

Daylight

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

Sunshine

In September, the average sunshine is 5.2h.

UV index

The months with the highest UV index are January through May, August through December, with an average maximum UV index of 12. A UV Index reading of 11, and higher, represents an extreme health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 12 in September interprets into the following advice:
Ensure every key safety measure. People with light skin might sustain burns in fewer than 5 minutes. The Sun's UV radiation is at its strongest between the hours of 10 a.m. and 4 p.m. Minimize direct exposure to the sun during this period. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. One should apply and reapply liberally a broad-spectrum sunscreen of SPF 30+ every two hours and immediately after a swim or an outdoor exercise. Alert! UV radiation becomes sharper due to reflections from sand and water.