The month in detail
What to expect in September
Spring marks the start of the good season in Perth. Temperatures rise (66°F) and tourists have not yet arrived en masse. Expect rain on 36% of days — a light raincoat in the bag is recommended. A good balance between weather and crowds, even if December (9.7/10) remains theoretically better.
September ranks 9 out of 12 months in Perth. Compared to August: +4°F daytime, 6 pts fewer rainy days, +0.5h of sun per day.
This month's conditions
What it's like in September
UV index
6 · high
sunscreen and hat advised
Feels like
dry air
10°
Sea
18°C
cool, invigorating
Daylight
11.8h of daylight
Air quality
good
AQI 23
Compare
Is September the right month?
The best month in Perth is December (9.7/10), 2.2 pts higher than September.
Book
Plan your trip
Hotels at their lowest outside peak season, highest on comfortable months. Shoulder seasons offer a good price/climate compromise.
Stay
Hotels & rentals · Perth
Expedia →
Activities
Tours, tickets, experiences
See ↓
Flights
Multi-airline comparator
Kiwi →
🎟️ Activities & tours · Perth
GetYourGuide selection · free cancellation
Practical info
What you need to know before you go
Three angles: the country (language, currency, safety, budget), the year-round climate, and the specifics of a beach trip.
Country · Australia
🗣️LanguageEnglish
💶CurrencyAustralian Dollar ($)
🚗DrivingLeft-hand
🛡️Safety ⓘVery safe · 1/5
💰Cost of living ⓘExpensive · 4/5
🌡️ Climate
🌍Climate typeTemperate oceanic
📈Climate trend ⓘ+2.68°F/decade
🔥Hottest monthJanuary · 86°F
❄️Coolest monthJuly · 63°F
🌧️Rainiest month ⓘJuly · 48%
🏖️ Beach trip
📅Peak seasonJuin → Sept
🏖️Swell (Sept–Mar) ⓘModérée
Explore
Other destinations in September
If September doesn't convince you for this destination, compare with others.
Location
Where is Perth ?
Global position + regional geographic context.
🌍 World
🔍 Geographic context
AustraliaTemperate oceanic climate with a 9.7 → 4.5 gap between best and worst month. 10 years of ERA5 data to choose by project.
31.95°S · 115.86°E
Questions
Frequently asked questions
What is the best time to visit Perth?
December is the best month with 82°F highs, 64°F lows, 11.5h of sunshine and 6.0% rainy days. The months of December & January offer comparable conditions.
How many hours of sunshine does Perth get in December?
Perth averages 11.5 sunshine hours per day in December. It is the sunniest month with a climate score of 9.6/10.
What is the rainiest month in Perth?
July is the most unfavourable month with July has the lowest climate score of the year and the lowest climate score of the year.
What are the temperatures at night in Perth in December?
In December, overnight lows reach 64°F, while afternoon highs average 82°F.
Is Perth good in winter?
In winter (December-February), Perth scores 9.4/10 on average — Acceptable conditions for cultural visits.. The best month overall remains December with a score of 9.6/10.
When should you avoid Perth?
July is the most difficult month to visit Perth, with July has the lowest climate score of the year. Climate conditions are at their lowest of the year during this period.
Can you swim in Perth in September?
In September, the sea averages 65°F in Perth: cool, invigorating. Swimming is possible but brisk; sensitive swimmers may prefer a wetsuit.
Do you need sun protection in Perth in September?
The average UV index reaches 6 in September in Perth (high), with about 11.8h of daylight. Sunscreen and hat advised.