Singapore Weather in September
What's the weather like in Singapore (Singapore) in September 2025?
The climate in Singapore during September can be summarized as hot, humid and wet.
September is in the fall / autumn in Singapore and is typically the 5th coldest month of the year. Daytime maximum temperatures average around a steamy 31°C (87°F), whilst at night 23°C (74°F) is normal.
| Daytime temperature | 30.6°C 87.1°F |
|---|---|
| Nightly temperature | 23.2°C 73.8°F |
| Average temperature | 26.9°C 80.5°F |
| Daily sunshine | 5.7 hrs |
| Avg rainfall | 179 mm 7.1 ins |
| Rainy days | 14 days |
| Sea temperature | 29.2°C 84.5°F |
| Humidity | 83% |
| Windspeed | 6.5kph 4 mph |
On average September is the 5th driest month of the year in Singapore with around 179mm 7.1 inches of rain making it a wet time to visit. This rainfall is typically spread over 14 days, although this may vary considerably.
On the flip side this corresponds to an average of 5.7 hours of sunshine per day.
September temperatures in Singapore
September rainfall
September hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Singapore in September 2025.
Other monthly averages
Best places to visit in September
Singapore weather stats
| Hottest month: | May | 31.1°C 88°F |
|---|---|---|
| Driest month: | June | 159mm 6.3ins |
| Sunniest month: | February | 6.8hrs |
| Coldest month: | December | 29.4°C 84.9°F |
| Wettest month: | December | 296mm 11.7ins |
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