SW Monsoon in Singapore
Singapore Weather in September
On average, Singapore sees a top of 31°C and an overnight low of 25°C in September, with around 14 rain days and 163mm of total rainfall. UV is typically very high, 10-11.
31°C
25°C
163mm
14
What September is like in Singapore
The second inter-monsoon period begins in late September. Rainfall increases with frequent Sumatra squalls bringing heavy rain and gusty winds overnight and in the early morning.
These figures are long-term averages, not a forecast — for today's actual conditions and the week ahead, check the live Singapore weather forecast. Averages are useful for planning travel, events or what to pack, but any single September can run warmer, cooler, wetter or drier than the long-term normal.