What to expect in Singapore in September
September is a mixed month in Singapore. You get 31° / 25°, but the biggest crowds of the year. Worth it for the right traveller.
Singapore weather in September
Typical conditions in Singapore during September, based on long-run climate normals rather than any single year. Treat it as a planning guide, not a forecast.
| Average high | 31°C 88°F |
|---|---|
| Average low | 25°C 77°F |
| Rainfall | Wet 55/100 |
| How it feels | Hot — midday shade matters |
Average highs sit around 31°C with lows near 25°C. Rainfall is moderate; the odd shower is likely.
Crowds & demand
Crowd levels are High for Singapore — the biggest crowds of the year.
Prices & value
Prices run high season this month: premium prices.
What to pack
Lightweight, breathable clothes, strong sun protection and a refillable bottle — highs near 31°C make midday heat the main constraint. Add a compact rain shell and shoes you do not mind soaking; this is one of the wetter months.
What it costs
This is peak pricing for Singapore. Expect to pay a premium on flights and accommodation, and to book considerably further ahead than usual. Compared with the most expensive month of the year, you are looking at roughly 6% less.
Who this month suits
- Visitors who want to catch a festival
Events & what’s on
Look out for Singapore Grand Prix while you’re there.
- Singapore Grand Prix — Formula One's only night race lights up the Marina Bay street circuit each September.
Singapore in September compared with nearby months
If your dates are flexible by a few weeks, this is what shifting them actually buys you.
| Month | Temp | Crowds | Price | Score |
|---|---|---|---|---|
| July | 31° / 25° | Moderate | $$ | 54 |
| August | 31° / 25° | Moderate | $$ | 53 |
| September · This month | 31° / 25° | High | $$$ | 43 |
| October | 31° / 25° | Moderate | $$ | 52 |
| November | 30° / 24° | Moderate | $$ | 51 |
These months score higher for Singapore on the same blend of weather, crowds and price. Same destination, better odds.
Or go somewhere else in September
If the destination is negotiable but the month is not, these places are at their best in September.
Figures are climate normals and modelled estimates — a planning guide, not a forecast. We separate fact, estimate and recommendation. Updated August 2026
