WanderWhen

Sydney weather in September

September is one of the best months to visit Sydney. Expect highs around 21°C, lows near 11°C, and about 8 days with rain.

9.7 · Excellenttravel score for September
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Avg high
21°C
Avg low
11°C
Rainfall
57 mm
Rain days
8
Sunshine
10.1 h/day
Daylight
11.8 h

What to pack for Sydney in September

  • t-shirts and light layers
  • a light jacket for evenings
  • a packable rain layer

Humidity averages 67%; max daily wind around 23 km/h.

How September compares

January: 8.5/10 JFebruary: 8.1/10 FMarch: 7.7/10 MApril: 9.2/10 AMay: 9.2/10 MJune: 8.4/10 JJuly: 8.6/10 JAugust: 9.9/10 ASeptember: 9.7/10 SOctober: 9.0/10 ONovember: 8.9/10 NDecember: 9.2/10 D

Best months in Sydney: April–May & August–September & December. See the full best time to visit Sydney guide.

Sydney in September: the details

In September, Sydney sees average daytime highs of 21°C (70°F) and overnight lows of 11°C (51°F). Rainfall totals roughly 57 mm across 8 rainy days, and the sun shines about 10.1 hours per day with 11.8 hours of daylight mid-month. Relative humidity averages 67%.

These figures are climate normals computed from the ERA5 weather reanalysis (2019–2024) for Sydney, Australia (-33.87, 151.21) — see our methodology. Actual conditions vary year to year.

Where should you go next month?

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