Sydney weather in September
September in Sydney: nice, a little rain, with clean air — an excellent time to visit.
#3 of 12 months in Sydney · #78 of 604 destinations to visit in September · comfort 90/100 (tier S)
Updated June 2026 · climate normals from ERA5 reanalysis
Sydney climate normals — September
| Daytime high | 20°C / 67°F | 😎 nice |
|---|---|---|
| Nighttime low | 12°C / 54°F | |
| Feels like (high) | 19°C / 66°F | |
| Rainfall | 46 mm / 1.8 in | 🌦 some rain |
| Rainy days | 7 days | |
| Humidity | 69% | 💧 humid |
| Dew point | 10°C / 49°F | |
| Sunshine | 9.9 h/day | |
| Daylight | 11.9 h | |
| Wind | 18 km/h / 11 mph | |
| Air quality (US AQI) | 45 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Sydney?
Loading map…
Sydney in September — FAQ
- Is September a good time to visit Sydney?
- September in Sydney: nice, a little rain, with clean air — an excellent time to visit. It ranks #3 of 12 months for Sydney on SeasonMap's comfort score (90/100).
- What is the weather like in Sydney in September?
- In September, Sydney averages a daily high of 19.7°C and a low of 12.2°C, with about 45.9 mm of rain over roughly 7.2 rainy days.
- What is the air quality in Sydney in September?
- Sydney has a mean US Air Quality Index of about 45 in September.