Western Australia (Perth)
September
Weather in Western Australia for September 2025
Your guide to Western Australia weather in September - trends and predictions
In general, the average temperature in Western Australia at the beginning of September is 17.7 °C. As the month progressed, temperatures tended to significantly warm up, reaching an average of 22.4 °C by the end of September.
Western Australia sees moderate rainfall in September, averaging 10 rainy days.
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20
Dry days
10
Rainy days
0
Snow days
21°/12°
Temperatures
21 km/h
Avg max wind
65 %
Avg humidity
Western Australia in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  20° | 2 19° | 3  17° | 4 17° | 5 16° | 6 17° | 7  18° |
| 8  21° | 9 21° | 10 21° | 11 22° | 12 23° | 13 21° | 14 21° |
| 15 20° | 16 21° | 17  22° | 18  20° | 19 19° | 20 21° | 21 23° |
| 22 25° | 23 20° | 24 21° | 25 21° | 26 26° | 27 24° | 28 23° |
| 29 21° | 30 21° |
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Temperatures trend during September in Western Australia
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. | Light rain shower | 20° /13° | 3 mm | 5 | |
| 2 Sept. | Light rain shower | 19° /11° | 3.4 mm | 6 | |
| 3 Sept. | Moderate or heavy rain shower | 17° /11° | 10.5 mm | 4 | |
| 4 Sept. | Light rain shower | 17° /12° | 7.7 mm | 5 | |
| 5 Sept. | Light rain shower | 16° /11° | 9.8 mm | 4 | |
| 6 Sept. | Patchy rain possible | 17° /10° | 3.2 mm | 5 | |
| 7 Sept. | Sunny | 18° /8° | 0.2 mm | 5 | |
| 8 Sept. | Overcast | 21° /10° | 0 mm | 6 | |
| 9 Sept. | Overcast | 21° /13° | 0 mm | 6 | |
| 10 Sept. | Patchy rain possible | 21° /11° | 0.1 mm | 6 | |
| 11 Sept. | Sunny | 22° /11° | 0 mm | 7 | |
| 12 Sept. | Overcast | 23° /13° | 0 mm | 6 | |
| 13 Sept. | Moderate or heavy rain shower | 21° /13° | 10.8 mm | 6 | |
| 14 Sept. | Overcast | 21° /12° | 0 mm | 6 | |
| 15 Sept. | Overcast | 20° /14° | 0 mm | 6 | |
| 16 Sept. | Patchy rain possible | 21° /12° | 0.2 mm | 6 | |
| 17 Sept. | Partly cloudy | 22° /11° | 0 mm | 7 | |
| 18 Sept. | Cloudy | 20° /10° | 0 mm | 6 | |
| 19 Sept. | Patchy rain possible | 19° /11° | 0.3 mm | 6 | |
| 20 Sept. | Patchy rain possible | 21° /10° | 0 mm | 6 | |
| 21 Sept. | Partly cloudy | 23° /10° | 0 mm | 7 | |
| 22 Sept. | Partly cloudy | 25° /12° | 0 mm | 7 | |
| 23 Sept. | Patchy rain possible | 20° /11° | 0.2 mm | 6 | |
| 24 Sept. | Sunny | 21° /10° | 0 mm | 6 | |
| 25 Sept. | Sunny | 21° /9° | 0 mm | 6 | |
| 26 Sept. | Sunny | 26° /12° | 0.1 mm | 7 | |
| 27 Sept. | Sunny | 24° /13° | 4.3 mm | 7 | |
| 28 Sept. | Sunny | 23° /13° | 0.2 mm | 6 | |
| 29 Sept. | Sunny | 21° /11° | 0 mm | 6 | |
| 30 Sept. | Patchy rain possible | 21° /12° | 0.3 mm | 6 | |
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Important Notice
Our weather forecast for Western Australia 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 Western Australia forecast closer to your planned date for the most up-to-date weather information.
Western Australia in September - FAQ
What are the expected maximum and minimum temperatures in Western Australia during September?
Enjoy moderate daytime temperatures of up to 21° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Western Australia during September?
Moderate rainfall is anticipated in Western Australia during September, with a total of 71.8 mm spread over approximately 10 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Western Australia during September?
The average wind speed in Western Australia during September is 21 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Western Australia
Explore the daily rainfall trends and prepare for Western Australias September weather 💧
UV exposure in Western Australia during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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