01Weather
Singapore weather in September
Afternoons in September average 31.6 °C (89 °F) and nights cool to 25.4 °C (78 °F). The month brings about 122 mm (4.8 in) of rain spread over roughly 11 days. Compared with August it is 0.2 °C cooler; October is 0.3 °C warmer again.
What the averages hide
| In a typical September | Value | What it means |
|---|---|---|
| Warm afternoons (90th percentile) | 33 °C / 91 °F | one day in ten is at least this warm |
| Cool afternoons (10th percentile) | 29 °C / 84 °F | one day in ten stays below this |
| Cold nights (10th percentile) | 24 °C / 75 °F | one night in ten is colder than this |
| Days above 30 °C (86 °F) | 26.9 | per month, average 2016–2025 |
| Nights at or below 0 °C (32 °F) | 0.0 | frost mornings per month |
| Chance of rain on any given day | 36 % | at least 1 mm |
| Hottest / coldest September day 2016–2025 | 34.0 °C / 22.0 °C | extremes in the ten-year record |
02Daylight
Sunrise, sunset and the length of the day
| Date | Sunrise | Sunset | Daylight |
|---|---|---|---|
| 1 September | 07:00 | 19:08 | 12.1 h |
| 15 September | 06:56 | 19:03 | 12.1 h |
| 30 September | 06:51 | 18:57 | 12.1 h |
Daylight shrinks by about 0 minutes over the month. Times are local (Asia/Singapore).
03Crowds
How busy Singapore is in September
very busy The main sights are very busy in September. What drives it:
- Formula 1 Singapore Grand Prix
- Mid-Autumn Festival lanterns in Chinatown
04Public holidays
Public holidays in September 2027
No public holidays in Singapore fall in September, so shops and museums keep normal hours all month.
05Events
What's on in Singapore in September
Every year in September
| Event | When | Type |
|---|---|---|
| Formula 1 Singapore Grand Prix | a weekend in September, night race around Marina Bay | sport |
| Mid-Autumn Festival | September or early October, Chinatown lanterns | festival |
07Packing
What to pack for Singapore in September
- light, breathable clothing
- sun hat and sunscreen
- refillable water bottle
- a compact umbrella or hooded rain jacket, rain falls on roughly one day in three
- something for heat: 27 days a month pass 30 °C on average
08Editor's notes
What the numbers don't tell you
September is dominated by the Formula 1 night race, held on a weekend in the second half of the month, when hotels near Marina Bay triple their rates, the city stays up late for the trackside concerts and roads around the circuit close from the Thursday. The Mid-Autumn Festival lights Chinatown with lanterns and fills bakeries with mooncakes, falling in September or early October. Avoid race weekend unless you are attending it.
Weather is hot with rain on about 11 days and possible haze in dry years. Outside race week, September is a reasonable-value month with the local schools in term and no major holidays. The Singapore Grand Prix tickets include access to the concerts, which is the main reason visitors come. Afternoon highs average 31 °C. The inter-monsoon returns in October with heavier afternoon storms.
09Compare
Singapore month by month
| Month | High | Low | Rain days | Sun h | Crowds | Verdict |
|---|---|---|---|---|---|---|
| January | 30 °C | 25 °C | 11 | – | busy | Mixed |
| February | 31 °C | 25 °C | 6 | – | busy | Good |
| March | 32 °C | 25 °C | 9 | – | moderate | Good |
| April | 32 °C | 26 °C | 12 | – | moderate | Good |
| May | 32 °C | 26 °C | 12 | – | moderate | Good |
| June | 32 °C | 26 °C | 12 | – | busy | Mixed |
| July | 32 °C | 26 °C | 11 | – | busy | Mixed |
| August | 32 °C | 26 °C | 12 | – | busy | Mixed |
| September | 32 °C | 25 °C | 11 | – | very busy | Mixed |
| October | 32 °C | 25 °C | 12 | – | moderate | Good |
| November | 31 °C | 25 °C | 18 | – | moderate | Mixed |
| December | 31 °C | 25 °C | 16 | – | very busy | Off-season |
Not sure about September? See the best time to visit Singapore.
10Elsewhere
September in nearby cities
| City | High | Rain days |
|---|---|---|
| Bangkok in September | 33 °C | 24 |
| Shanghai in September | 30 °C | 12 |
| Beijing in September | 28 °C | 8 |
| Seoul in September | 27 °C | – |
| Kyoto in September | 30 °C | 10 |
| Tokyo in September | 28 °C | 12 |
11FAQ
Singapore in September: your questions
Is September a good time to visit Singapore?
September is a reasonable month with trade-offs to visit Singapore. Daytime highs average 32 °C (89 °F), rain falls on about 11 days, and hotel arrivals run above the yearly average, so the main sights are very busy.
What is the weather like in Singapore in September?
Expect hot days around 32 °C (89 °F) and nights near 25 °C (78 °F). One September in ten brings afternoons above 33 °C, and one in ten stays below 29 °C.
Does it rain a lot in Singapore in September?
September brings about 122 mm (4.8 in) of rain over roughly 11 days, which is showery by Singapore standards. On any given day the chance of at least 1 mm of rain is 36 percent.
What should I wear in Singapore in September?
Pack light, breathable clothing, sun hat and sunscreen, refillable water bottle.
Is Singapore crowded in September?
The main sights are very busy in September. Main drivers: Formula 1 Singapore Grand Prix; Mid-Autumn Festival lanterns in Chinatown.
What time does it get dark in Singapore in September?
Around the middle of September the sun sets at about 19:03 and rises at 06:56, giving 12.1 hours of daylight.