What September feels like in Perth
In Perth, September brings early spring (Perth is in the southern hemisphere, so the seasons run opposite to Europe and North America). Afternoons are mild and comfortable for most people in light layers. Once the sun goes down the air changes: nights are cool. The air is fairly humid, though at these temperatures it rarely feels oppressive.
Rain in Perth in September
Showers are a regular feature, arriving about one day in 4. Each rainy day adds about 6.9 mm (0.3 in), a proper wetting rather than a sprinkle. The yearly figure is similar, around 7.8 mm per wet day.
Daylight and sunshine in September
In mid-September, sunrise is at about 6:16 am and sunset at about 6:07 pm (local time) — 11 h 51 min of daylight. Days are getting longer: 56 min more daylight than in mid-August. About 91% of daylight hours are sunny; in short, skies are mostly clear.
How September compares to the rest of the year
Ranked by average high, September comes out as the 4th coolest month in Perth. Compared with August, afternoons are 1.3°C (2.3°F) warmer, with 42 mm less rain. Temperatures keep climbing into October. The next month's average high: 22.2°C (72°F).
Who September suits
- Sightseeing: a good fit — daytime temperatures are fine for walking around.
- Parks & outdoor: a good fit — comfortable for long walks and picnics.
- Beach: less ideal — too many rainy days.
Tips for visiting Perth in September
Versatile Layers
Days are noticeably warmer than nights — layers you can add or remove.
Rain Protection
Keep a small umbrella in your bag and wear shoes that cope with puddles.
Sunglasses
Frequent sunshine — sunglasses and a light hat.
Quick questions
How warm is Perth in September?
Expect around 19.1°C (66.4°F) in the afternoon and 10.7°C (51.3°F) at night, which most visitors would call mild.
Does it rain a lot in Perth in September?
Quite a lot — 55 mm spread over about 8 days.
What should I wear in Perth in September?
Based on the averages: versatile layers, rain protection and sunglasses. Bring something extra for the cooler evenings.
Is September or October better for visiting Perth?
On our 12-month climate ranking, October comes out ahead (#7 of 12 vs #8). October is warmer and has fewer rainy days.