Singapore in September
In September, Singapore averages 31°C (88°F) during the day and 25°C (77°F) at night, with frequent rain — about 14 days of the month see precipitation (175 mm total).
ShoulderConditions are warm and beach-friendly. Plan for unsettled weather and bring rain gear.
September is one of the wetter and less comfortable months in Singapore. If your dates are flexible, consider a different time of year.
How September compares to the rest of the year in Singapore
September is in the middle of the year for warmth in Singapore (8th of 12) and moderately rainy compared to the rest of the year (8th of 12). Daytime temperature matches the city's annual average. September runs roughly the same as August (31°C) and stays flat into October.
September sunrise & sunset in Singapore
Times shown for Singapore local time (Asia/Singapore), calculated for the 15th of September. They shift by a few minutes day to day across the month.
Photography light in Singapore — September
Golden-hour and blue-hour windows for the 15th of September, in Singapore's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Singapore in September
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on September's tier (Shoulder) and Singapore's popularity.
Crowds & pricing — September in Singapore
Singapore is in a shoulder season month — fewer crowds, slightly lower prices, and a calmer atmosphere than peak weeks. Most major sights stay open with normal hours, though a handful of seasonal restaurants or boat trips may run reduced schedules. Many regulars consider these months the best time to visit because you trade a small amount of weather reliability for a much more pleasant on-the-ground experience.
Sun & mosquito risk — September in Singapore
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
Sea temperature in Singapore — September
Across the year Singapore's sea swings from 28.2°C (January) to 30.8°C (May) — September sits at 29.7°C.
Singapore in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 30°C / 86°F | 24°C / 75°F | 245 mm | 14 | — |
| February | 31°C / 88°F | 24°C / 75°F | 165 mm | 9 | — |
| March | 32°C / 90°F | 25°C / 77°F | 190 mm | 13 | — |
| April | 32°C / 90°F | 25°C / 77°F | 175 mm | 14 | — |
| May | 32°C / 90°F | 26°C / 79°F | 175 mm | 14 | — |
| June | 32°C / 90°F | 26°C / 79°F | 165 mm | 13 | — |
| July | 31°C / 88°F | 25°C / 77°F | 155 mm | 12 | — |
| August | 31°C / 88°F | 25°C / 77°F | 155 mm | 14 | — |
| September | 31°C / 88°F | 25°C / 77°F | 175 mm | 14 | — |
| October | 31°C / 88°F | 25°C / 77°F | 195 mm | 15 | — |
| November | 30°C / 86°F | 24°C / 75°F | 260 mm | 18 | — |
| December | 30°C / 86°F | 24°C / 75°F | 295 mm | 18 | — |
Other cities with similar September weather
🌍 See the full ranked list of climate twins for Singapore in September →
Frequently asked questions
How hot is Singapore in September?
In September, Singapore averages a high of 31°C (88°F) and a low of 25°C (77°F) — generally hot.
Does it rain a lot in Singapore in September?
September can be fairly wet in Singapore, with about 14 rainy days on average.
Is September a good time to visit Singapore?
September is hot but on the rainy side. It suits travelers who are comfortable with hot weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for Singapore in September?
Pack lightweight, breathable clothing, sunglasses and sunscreen, plus a compact umbrella or rain jacket. See the full September packing list for Singapore for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.