Weather in Sydney in September
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Book now, pay at pickup — compare Hertz, Avis, Budget, Sixt and 800+ rental companies for September in Sydney.
Compare car hire prices → Affiliate link — we earn a commission at no extra cost to youIn September, Sydney sees average highs of 20.9°C (69.6°F) and lows of 10.6°C. Conditions are pleasantly mild and moderately rainy (8 rainy days), with roughly 10.1 hours of sunshine a day. This is peak season for good reason — conditions are close to ideal. For the complete picture, see the best time to visit Sydney — every month compared. Once you know when to go, find your Sydney packing list at 247PackingList.
Get ready for Sydney in September
Search flights to Sydney
Compare 100+ airlines for September — one search, best price.
Search Flights →Travel clothing layers
Pack layers — temperatures can vary significantly between day and night.
Check Price →What to pack for Sydney in September
- Light layers
- Sunscreen
- T-shirts and light trousers or shorts
- A warm layer for cool evenings
Compare all months in Sydney
| Month | High | Rain | Rating |
|---|---|---|---|
| January | 26.0°C | 114.1mm | 9/10 |
| February | 25.4°C | 167.6mm | 9/10 |
| March | 24.3°C | 217.3mm | 8/10 |
| April | 22.3°C | 89.6mm | 10/10 |
| May | 19.0°C | 83.9mm | 10/10 |
| June | 17.0°C | 39.5mm | 10/10 |
| July | 16.9°C | 118.6mm | 9/10 |
| August | 18.5°C | 63.3mm | 10/10 |
| September | 20.9°C | 48.6mm | 10/10 |
| October | 22.5°C | 107.6mm | 9/10 |
| November | 22.8°C | 95.7mm | 10/10 |
| December | 24.5°C | 90.5mm | 10/10 |
Full month-by-month guide: best time to visit Sydney →
For facts about Australia — currency, language and dialling code — see our Australia country guide at 247CountryInfo. Travellers also find it useful to keep a Sydney travel guide to hand. Check clothing sizes in Australia before you shop.
Frequently Asked Questions
Is September a good time to visit Sydney?
September rates 10/10 for visiting Sydney — excellent time to visit. Expect average highs of 20.9°C, 48.6mm of rain across the month and about 10.1 hours of daily sunshine.
What is the temperature in Sydney in September?
In September, Sydney has average highs of 20.9°C (69.6°F) and average lows of 10.6°C (51.1°F).
Does it rain in Sydney in September?
Not much. September averages just 48.6mm of rain in Sydney — the odd shower is possible but most days stay dry.
What should I wear in Sydney in September?
For Sydney in September (20.9°C highs / 10.6°C lows), pack light layers plus sunscreen, t-shirts and light trousers or shorts, a warm layer for cool evenings.
More essentials for Sydney in September
Packing cubes
Keep the bag organised whatever the weather — compression cubes for every size.
Check Price →Travel first aid kit
Compact TSA-friendly kit for peace of mind wherever you travel.
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Climate data sourced from Open-Meteo (open source, open data licence). Monthly averages calculated from 2020–2023 historical data. Weather can be unpredictable — always check a live forecast before travelling.