What September feels like in Sydney
For Sydney, September is early spring on the calendar (Sydney is in the southern hemisphere, so the seasons run opposite to Europe and North America). Mild afternoons make it easy to spend hours outdoors. After dark the temperature drops clearly: nights are cool. Humidity is on the high side, but mild temperatures keep it comfortable.
Rain in Sydney in September
Rain turns up now and then — about one day in 4. Each rainy day adds about 6.7 mm (0.3 in), a proper wetting rather than a sprinkle. Across the year Sydney averages about 7.7 mm per rainy day, so September is typical. September is Sydney's driest month of the year.
Daylight and sunshine in September
In mid-September, sunrise is at about 5:55 am and sunset at about 5:46 pm (local time) — 11 h 50 min of daylight. Days are getting longer: 1 h more daylight than in mid-August. Measured sunshine covers about 89% of the daylight — skies are mostly clear.
How September compares to the rest of the year
Ranked by average high, September comes out as the 5th coolest month in Sydney. Afternoons run 2.6°C (4.7°F) warmer than in August, with 4 mm less rain. October continues the upward trend. The next month's average high: 22.2°C (72°F).
Who September suits
- Sightseeing: a good fit — the weather rarely gets in the way of a city walk.
- Parks & outdoor: a good fit — comfortable for long walks and picnics.
- Beach: less ideal — too many rainy days.
Tips for visiting Sydney in September
Versatile Layers
Mornings and evenings are cooler than midday, so dress in layers.
Sunglasses
Bright days make sunglasses worth packing.
Quick questions
How warm is Sydney in September?
It feels mild: typical highs are 20.3°C (68.5°F), with lows near 11.3°C (52.3°F).
Does it rain a lot in Sydney in September?
Not especially. There are about 7 rainy days (47 mm), mostly moderate rain.
What should I wear in Sydney in September?
Pack versatile layers and sunglasses. Add a layer for after dark.
Is September or October better for visiting Sydney?
On our 12-month climate ranking, September comes out ahead (#1 of 12 vs #3). October is warmer and has more rainy days.