Sydney
September
Weather in Sydney for September 2025
Your guide to Sydney weather in September - trends and predictions
In general, the average temperature in Sydney at the beginning of September is 21.3 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 17 °C by the end of September.
The climate of Sydney in September is notably wet, with an average of 11 rainy days.
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19
Dry days
11
Rainy days
0
Snow days
20°/12°
Temperatures
18 km/h
Avg max wind
84 %
Avg humidity
Sydney in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  21° | 2  22° | 3 21° | 4  22° | 5  21° | 6  22° | 7 20° |
| 8 24° | 9 23° | 10 22° | 11 18° | 12 19° | 13 22° | 14 19° |
| 15  20° | 16 22° | 17 22° | 18 24° | 19  21° | 20 18° | 21 14° |
| 22 14° | 23 17° | 24 18° | 25 15° | 26  16° | 27 16° | 28 18° |
| 29 18° | 30 18° |
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Temperatures trend during September in Sydney
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Cloudy | 21° /12° | 0 mm | 5 | |
| 2 Sept. | Partly cloudy | 22° /11° | 2.3 mm | 6 | |
| 3 Sept. | Partly cloudy | 21° /11° | 0.5 mm | 5 | |
| 4 Sept. | Fog | 22° /11° | 0 mm | 5 | |
| 5 Sept. | Light drizzle | 21° /12° | 0.3 mm | 5 | |
| 6 Sept. | Light rain shower | 22° /15° | 3.5 mm | 5 | |
| 7 Sept. | Light rain shower | 20° /16° | 15 mm | 5 | |
| 8 Sept. | Fog | 24° /17° | 1.2 mm | 6 | |
| 9 Sept. | Fog | 23° /15° | 1.8 mm | 6 | |
| 10 Sept. | Mist | 22° /13° | 1.2 mm | 5 | |
| 11 Sept. | Light rain shower | 18° /12° | 2.5 mm | 4 | |
| 12 Sept. | Fog | 19° /12° | 0 mm | 4 | |
| 13 Sept. | Fog | 22° /13° | 0 mm | 5 | |
| 14 Sept. | Light rain | 19° /13° | 0.7 mm | 5 | |
| 15 Sept. | Moderate rain at times | 20° /11° | 3.8 mm | 5 | |
| 16 Sept. | Moderate or heavy rain shower | 22° /13° | 5.8 mm | 5 | |
| 17 Sept. | Light rain | 22° /16° | 1.6 mm | 5 | |
| 18 Sept. | Mist | 24° /14° | 0 mm | 6 | |
| 19 Sept. | Heavy rain | 21° /13° | 21.5 mm | 5 | |
| 20 Sept. | Patchy rain possible | 18° /13° | 0.1 mm | 4 | |
| 21 Sept. | Light drizzle | 14° /11° | 0.5 mm | 3 | |
| 22 Sept. | Patchy rain possible | 14° /9° | 0.1 mm | 3 | |
| 23 Sept. | Cloudy | 17° /9° | 0 mm | 4 | |
| 24 Sept. | Cloudy | 18° /10° | 0 mm | 5 | |
| 25 Sept. | Light rain shower | 15° /10° | 0.3 mm | 4 | |
| 26 Sept. | Overcast | 16° /8° | 0 mm | 4 | |
| 27 Sept. | Overcast | 16° /9° | 13 mm | 4 | |
| 28 Sept. | Fog | 18° /10° | 45.7 mm | 5 | |
| 29 Sept. | Mist | 18° /8° | 0 mm | 4 | |
| 30 Sept. | Mist | 18° /8° | 0 mm | 5 | |
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Important Notice
Our weather forecast for Sydney in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Sydney forecast closer to your planned date for the most up-to-date weather information.
Sydney in September - FAQ
What are the expected maximum and minimum temperatures in Sydney during September?
Enjoy moderate daytime temperatures of up to 20° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Sydney during September?
Moderate rainfall is anticipated in Sydney during September, with a total of 82.6 mm spread over approximately 11 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Sydney during September?
The average wind speed in Sydney during September is 18 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Sydney
Explore the daily rainfall trends and prepare for Sydneys September weather 💧
UV exposure in Sydney during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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