Click on a day for an hourly weather forecast
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.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 30° / 25° | 16 | 15 | 0 | 352 mm | Ok | Singapore in January |
| February | 31° / 25° | 12 | 17 | 0 | 217 mm | Ok | Singapore in February |
| March | 31° / 26° | 16 | 15 | 0 | 286 mm | Ok | Singapore in March |
| April | 32° / 26° | 18 | 12 | 0 | 329 mm | Ok | Singapore in April |
| May | 32° / 27° | 16 | 15 | 0 | 275 mm | Ok | Singapore in May |
| June | 31° / 27° | 12 | 18 | 0 | 214 mm | Ok | Singapore in June |
| July | 31° / 27° | 11 | 20 | 0 | 194 mm | Ok | Singapore in July |
| August | 31° / 27° | 13 | 18 | 0 | 221 mm | Ok | Singapore in August |
| September | 31° / 26° | 10 | 20 | 0 | 197 mm | Ok | Singapore in September |
| October | 31° / 26° | 14 | 17 | 0 | 272 mm | Ok | Singapore in October |
| November | 31° / 26° | 19 | 11 | 0 | 419 mm | Ok | Singapore in November |
| December | 30° / 25° | 20 | 11 | 0 | 451 mm | Ok | Singapore in December |