Weather in Singapore in September 2025
Average weather
Average temperature in Singapore in September
The temperature in September is +90°F on average, with a range between a maximum of +91°F during the day and a minimum of +75°F at night.
The average maximum temperature goes down 11% by the end of the month, compared with the beginning of the month, from +90°F to +88°F.
Is Singapore warm or cold in September?
Singapore is typically warm in September.
Maximum temperatures go up compared to the previous month from +86°F to +86°F. The minimum temperature also goes down from +79°F to +77°F.
It’s generally warm, but pack a long-sleeve shirt for evenings.
Take a look at how September is compared to other months in Singapore:
Water temperature in Singapore in September
Water in Singapore in September is Very warm. It varies from +83°F to +87°F, with an average of +85°F. This is almost similar to the air temperature, which averages +86°F.
In September, water temperatures are average relative to the rest of the year:
Can you swim in Singapore in September?
Travel to Singapore
Climate in Singapore in September
| August | September | October | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +86°F | +86°F | +86°F | ||||
| Min. temperature | ||||||
| +73°F | +72°F | +73°F | ||||
| Max. temperature | ||||||
| +93°F | +95°F | +95°F | ||||
| Rainfall | ||||||
| 129 mm | 115 mm | 146 mm | ||||
| Wind | ||||||
| 2 m/s | 2 m/s | 1 m/s | ||||
| Avg. water temperature | ||||||
| +85°F | +85°F | +86°F | ||||
| Humidity | ||||||
| 79% | 79% | 80% | ||||
| Air pressure | ||||||
| 1008 HPa | 1009 HPa | 1009 HPa | ||||
| Sunny days | ||||||
| 0 | 0 | 0 | ||||
| Cloudy days | ||||||
| 4 | 5 | 3 | ||||
| Rainy days | ||||||
| 15 | 12 | 10 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
September weather is still as ok as in August. The temperature levels stay the same in the area of +86°F for average maximum temperature during the day. As September arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 129 mm to 115 mm. Humidity levels don’t change as the month goes on, averaging around 79%. The average wind speed doesn’t change much during September, staying around 2 m/s. The amount of sunny days stay about the same, averaging 0 sunny days during the month.
October brings much the same weather, it remains ok.
Wind
The average wind speed is 3 m/s getting up to 5 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Singapore is gradually decreasing during September, going from 4 m/s to 3 m/s over the course of the month.
Rain
How was the weather last September in Singapore?
Climate Change Over the Years
The climate in Singapore in September has not changed that much over the last 43 years.
The average temperature was the lowest in 1984 (+82°F) and the highest in 2016 (+90°F). The driest year was 1990 with only 668 mm of rainfall, and the wettest year was 2017 with 2506 mm.
FAQ
Is September a good time to visit Singapore?
Can you sunbathe in Singapore in September?
Can you swim in Singapore in September?
Is Singapore rainy in September?
Is it sunny in Singapore in September?
How much does it cost to fly to Singapore in September?
Monthly weather in Singapore
Source of the data
For this page, we’ve looked at the typical weather in Singapore, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.