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Weather in Sydney for September 2025

Your guide to Sydney weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in Sydney is slightly cooler than the historical average by -1.4 °C.

  • Expect cooler weather in the next days in Sydney with the forecast suggesting a temperature of 17.9 °C, lower than the historical average.

  • In general, the average temperature in Sydney at the beginning of September is 21.4 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 15.3 °C by the end of September.

    • Rain 🌧️

  • The climate of Sydney in September is notably wet, with an average of 13 rainy days, and a total of 121.4 mm of precipitation.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
17
Dry days
Average rainy days
13
Rainy days
Average snowy days
0
Snow days
Average temperatures
19°/12°
Temperatures
Average wind speed
19 km/h
Avg max wind
Average humidity
81 %
Avg humidity

Sydney Weather September

Move between months or click on a day
August
October
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Cloudy
21°
2
Partly cloudy
21°
3
Partly cloudy
20°
4
Fog
23°
5
Light drizzle
20°
6
Overcast
23°
7
Light rain shower
22°
8
Fog
23°
9
Fog
22°
10
Mist
21°
11
Light rain shower
18°
12
Fog
18°
13
Fog
20°
14
Patchy rain possible
20°
15
Partly cloudy
20°
16
Sunny
22°
17
Sunny
24°
18
Sunny
24°
19
Patchy rain possible
23°
20
Patchy rain possible
12°
21
Sunny
18°
22
Partly cloudy
18°
23
Sunny
17°
24
Partly cloudy
16°
25
Patchy rain possible
13°
26
Patchy rain possible
14°
27
Moderate rain
10°
28
Fog
18°
29
Mist
18°
30
Mist
18°

Temperatures trend during September in Sydney

See the weather trend as well as the moving average line

September weather in Sydney day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Cloudy
Cloudy
 21° /12° 0 mm 5
2 Sept. Partly cloudy
Partly cloudy
 21° /10° 2.2 mm 5
3 Sept. Partly cloudy
Partly cloudy
 20° /11° 0.3 mm 5
4 Sept. Fog
Fog
 23° /12° 0 mm 5
5 Sept. Light drizzle
Light drizzle
 20° /12° 0.2 mm 5
6 Sept. Overcast
Overcast
 23° /15° 2.3 mm 5
7 Sept. Light rain shower
Light rain shower
 22° /17° 11.2 mm 5
8 Sept. Fog
Fog
 23° /16° 3.6 mm 5
9 Sept. Fog
Fog
 22° /14° 1.2 mm 5
10 Sept. Mist
Mist
 21° /13° 0.8 mm 5
11 Sept. Light rain shower
Light rain shower
 18° /13° 4.7 mm 4
12 Sept. Fog
Fog
 18° /12° 0 mm 4
13 Sept. Fog
Fog
 20° /13° 0 mm 5
14 Sept. Patchy rain possible
Patchy rain possible
 20° /13° 4 mm 1
15 Sept. Partly cloudy
Partly cloudy
 20° /12° 0 mm 0.9
16 Sept. Sunny
Sunny
 22° /12° 0 mm 1.1
17 Sept. Sunny
Sunny
 24° /14° 0 mm 1.2
18 Sept. Sunny
Sunny
 24° /14° 0 mm 0.1
19 Sept. Patchy rain possible
Patchy rain possible
 23° /11° 4.3 mm 4
20 Sept. Patchy rain possible
Patchy rain possible
 12° /9° 0.7 mm 3
21 Sept. Sunny
Sunny
 18° /8° 0 mm 4
22 Sept. Partly cloudy
Partly cloudy
 18° /11° 0.1 mm 4
23 Sept. Sunny
Sunny
 17° /9° 0 mm 4
24 Sept. Partly cloudy
Partly cloudy
 16° /8° 0 mm 4
25 Sept. Patchy rain possible
Patchy rain possible
 13° /11° 1.3 mm 3
26 Sept. Patchy rain possible
Patchy rain possible
 14° /11° 0.9 mm 3
27 Sept. Moderate rain
Moderate rain
 10° /9° 17.8 mm 3
28 Sept. Fog
Fog
 18° /10° 45.7 mm 5
29 Sept. Mist
Mist
 18° /8° 0 mm 4
30 Sept. Mist
Mist
 18° /8° 0 mm 5
Next
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.
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Sydney in September - FAQ

What are the expected maximum and minimum temperatures in Sydney during September?
Enjoy moderate daytime temperatures of up to 19° 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?
Significant rainfall exceeding 121.4 mm is expected in Sydney during September, occurring over more than 13 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Sydney during September?
The average wind speed in Sydney during September is 19 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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Get accurate weather forecasts for Sydney, located at latitude 46.135 and longitude -60.183. Stay updated with localized weather information tailored for Sydney.

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