Singapore weather in September
September in Singapore: sweltering, soaked, with very humid — a good time to visit.
#4 of 12 months in Singapore · #511 of 604 destinations to visit in September · comfort 61/100 (tier C)
Updated June 2026 · climate normals from ERA5 reanalysis
Singapore climate normals — September
| Daytime high | 29°C / 83°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 26°C / 79°F | |
| Feels like (high) | 34°C / 93°F | |
| Rainfall | 207 mm / 8.1 in | ⛈ soaked |
| Rainy days | 24 days | |
| Humidity | 81% | 💦 very humid |
| Dew point | 24°C / 75°F | |
| Sunshine | 9.1 h/day | |
| Daylight | 12.1 h | |
| Wind | 14 km/h / 9 mph | |
| Air quality (US AQI) | 57 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Singapore?
Loading map…
Singapore in September — FAQ
- Is September a good time to visit Singapore?
- September in Singapore: sweltering, soaked, with very humid — a good time to visit. It ranks #4 of 12 months for Singapore on SeasonMap's comfort score (61/100).
- What is the weather like in Singapore in September?
- In September, Singapore averages a daily high of 28.5°C and a low of 25.9°C, with about 207 mm of rain over roughly 24 rainy days.
- What is the air quality in Singapore in September?
- Singapore has a mean US Air Quality Index of about 57 in September.