September weather forecastSeletar, Singapore

Weather in September

September marks an eventual decrease in heat with the longest sunshine duration of the year at 8.9 hours per day extending sunlight activities. This month the average low temperature drops to 25.4°C (77.7°F) and the rainfall is moderate. The winds blow at regular speeds creating a comfortable atmosphere for enjoying strolls in the park. Despite being the month with the lowest rainfall, occasional showers break the monotony of the sun, keeping the weather pleasant. High visibility and low humidity conditions allow tourists to explore the cityscape without discomfort during this time.

Temperature

The arrival of September in Seletar coincides with an average high-temperature of a still tropical 31.6°C (88.9°F), indicating a minimal shift from August's 31.3°C (88.3°F). Throughout the month of September, Seletar reports a steady low-temperature average of 25.4°C (77.7°F).

Heat index

For most parts of September, the heat index is appraised at a blistering 40°C (104°F). Ensure extra safety steps, heat exhaustion and heat cramps are likely. Long activity might lead to heatstroke.
Heat index guidelines indicate values are for light wind scenarios and shaded regions. Exposure to direct sunlight may make the heat index values climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is a value derived by merging air temperature with the humidity to convey how the climate feels. Elements of metabolic variation, physical activity, and clothing contribute to the effect of temperature on an individual. Recognize that direct exposure to the sun can escalate the heat effect, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are highly critical for babies and toddlers. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.
The physiological way the human body responds to excessive heat is by inducing perspiration, using sweat evaporation as a cooling mechanism. When the level of relative humidity is elevated, evaporation diminishes, causing more warmth to be retained in the body than in dry air. Heat-related complications, like dehydration, can manifest if the body's heat gain exceeds its dissipation capacity.

Humidity

With an average relative humidity of 73%, September is the least humid month.

Rainfall

In Seletar, in September, it is raining for 19 days, with typically 34mm (1.34") of accumulated precipitation. In Seletar, during the entire year, the rain falls for 250.9 days and collects up to 733mm (28.86") of precipitation.

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

September has the most sunshine of the year, with an average of 8.9h of sunshine.

UV index

January through November, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for the ordinary person.
Note: A maximum high UV index of 7 in September translates into the following recommendations:
Eschew overexposure. Those with light skin may suffer burns in fewer than 20 minutes. It's important to stay in the shade and limit exposure to the sun from 10 a.m. to 4 p.m., when UV radiation is most intense, although remember that shade structures may not provide full sun protection. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.