The weather in Singapore in September is very hot. The average temperatures are between 26°C and 31°C, drinking water regularly is advisable.
You can expect rain for roughly half of the month of September in Singapore. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Singapore in September 2025.
If you’re planning to visit Singapore in the near future, we highly recommend that you review the 14 day weather forecast for Singapore before you arrive.
Temperatures
31° / 26°
Rainy Days
10
Snowy Days
0
Dry Days
20
Rainfall
197
mm
Sun Hours
11.0
Hrs
