Is Sydney hot in September?
Days are typically mild at 21.6°C, while nights average 12.3°C.
Australia · 1991–2020 normal
Sydney in
September.
Typical September weather in Sydney: 21.6°C by day, 12.3°C at night, 63 mm of rain over 5.8 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high21.6°C
Typical low12.3°C
Rain63 mm
Wet days5.8
In the year-round weather comparison, September scores 81 out of 100 (October leads the year at 88). Daylight is calculated as 11 h 56 from latitude -33.87°. Open-water sea temperature is 18.3°C (16 km from the place centre).
September at a glance
What is Sydney like in September?
Plain answers from the measured climate record—not a forecast or a promise about a particular trip.
Does it rain much?
The measured monthly average is 63 mm across about 6 wet days.
How much daylight is there?
There are about 11 h 56 between sunrise and sunset at mid-month, calculated from the place latitude.
Is September a good time to visit?
September ranks 4 of 12 in our weather comparison; October ranks first.
The evidence behind this page
One month,
from the same station.
- Place identity
- GeoNames 2147714
- NOAA station
- ASN00066062 · SYDNEY (OBSERVATORY HILL)
- Station distance
- 0.8 km from the place centre
- Coverage
- Strong coverage · 29 usable years
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.
Next step
Choose your month.
Then plan the details.
The weather comparison for Sydney is based on climate evidence, not payments from travel companies. Flight, accommodation and activity links will be clearly labelled when they are added; there are no booking offers on this page today.
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