September marks the transition phase into the final quarter of the year in
Singapore. The subtle dip in sea temperature to 29.4°C (84.9°F) 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
The weather during September in Singapore hits a high-temperature average of a still hot 30.9°C (87.6°F), identical to the previous month. Singapore's temperature in September lowers to a consistent average of 24.2°C (75.6°F) during the nights.
Heat index
The heat index value during September is computed to be a blistering 42°C (107.6°F). Exercise extra preventive actions, heat cramps and heat exhaustion are plausible. Continuous activity could result in heatstroke.
It is crucial to understand that heat index figures are for shade and gentle wind conditions. Direct sunlight exposure may result in a rise of the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', measures the perceived warmth when incorporating the humidity present in the air. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. One must note that being under the direct sun can escalate the heat's effects, with the heat index possibly rising by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Children often lack awareness of the importance of taking breaks and rehydrating. The feeling of thirst is a late indication of dehydration, so maintaining hydration, especially during long periods of physical activity, is critical.
Perspiration and the resultant sweat evaporation are the body's natural thermostat, helping regulate temperature. Elevated relative humidity diminishes evaporation, thereby reducing the body's ability to shed heat and creating a feeling of being too warm. When body heat isn't effectively managed, risks of dehydration and overheating amplify.
Humidity
In September, the average relative humidity is 83.4%.
Rainfall
In September, in Singapore, Singapore, the rain falls for 14 days. Throughout September, 169mm (6.65") of precipitation is accumulated. In Singapore, during the entire year, the rain falls for 178 days and collects up to 2343mm (92.24") of precipitation.
Sea temperature
In September, the average sea temperature in Singapore, Singapore, is 29.4°C (84.9°F).
Note: For swimming, diving, and various water activities, the temperatures ranging from 25°C (77°F) to 29°C (84.2°F) are seen as highly enjoyable and comfortable for extended durations without any discomfort.
Daylight
In Singapore, 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 in Singapore are
January through
May, August through
December, with an average maximum UV index of 12. A UV Index value of 11, and more, symbolizes an excessive health risk from unprotected exposure to Sun's UV rays for average individuals.
Note: A maximum UV index of 12 in September translates into the following recommendations:
Implement all key precautions. Warding off sun damage is critical. Stay out of direct sunlight and seek shade between 10 a.m. and 4 p.m., when UV radiation is strongest, but remember that shade devices may not offer full sun protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Broad-spectrum SPF 30+ sunscreen must be generously applied and reapplied every two hours or post any outdoor activity or swim. Beware! Reflecting off water and sand, UV rays are much stronger.