Verdict: Excellent month
Perth Weather in September
September hits the sweet spot in Perth — highs around 20°C (68°F), ideal for a full day on foot. Rain is occasional — about 8 wet days in a typical year. Overall, September is one of the best months of the year to be in Perth.
Average high
20°C / 68°F
Average low
11°C / 52°F
Rain days
~8
Precipitation
51 mm
What to pack for Perth in September
- Layers — t-shirts under a light jacket or sweater
- A packable rain shell or compact umbrella earns its space
- Comfortable walking shoes — every guide on this site assumes you'll use them
September against the rest of the year
Warmest in Perth: Feb (31°C / 88°F) · Coolest: Jun (18°C / 64°F) · Wettest: Jul (~17 rain days)
30°
19°
Jan
31°
20°
Feb
29°
18°
Mar
25°
15°
Apr
22°
13°
May
18°
11°
Jun
18°
11°
Jul
18°
10°
Aug
20°
11°
Sep
22°
12°
Oct
25°
15°
Nov
29°
18°
Dec
Daily highs / lows in °C · bars show rain days per month · ERA5 climate normals (2020–2024)