Perth in September
In September, Perth averages 19°C (67°F) during the day and 11°C (51°F) at night, with frequent rain — about 15 days of the month see precipitation (46 mm total).
High seasonConditions are comfortable for sightseeing without being sweltering. Plan for unsettled weather and bring rain gear.
September offers comfortable temperatures in Perth, with some rain to plan around.
How September compares to the rest of the year in Perth
September is in the middle of the year for warmth in Perth (9th of 12) and moderately rainy compared to the rest of the year (4th of 12). Daytime temperature runs 4°C below the annual average (23°C). September runs 2°C warmer than August (18°C) and warms a further 2°C into October (22°C).
September sunrise & sunset in Perth
Times shown for Perth local time (Australia/Perth), calculated for the 15th of September. They shift by a few minutes day to day across the month.
Photography light in Perth — September
Golden-hour and blue-hour windows for the 15th of September, in Perth's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Perth in September
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on September's tier (High season) and Perth's popularity.
Crowds & pricing — September in Perth
This is a busy month in Perth — not the absolute peak, but tourist numbers are clearly elevated. You'll feel it at headline attractions on weekends and in the historic centre, though side streets and lesser-known sights stay manageable. Prices are above off-season but not at their summit. A good week for first-time visitors who want everything open without the worst of the crush.
Why this tier: excellent tourism weather
Sun & mosquito risk — September in Perth
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
Perth in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 30°C / 86°F | 19°C / 66°F | 23 mm | 4 | — |
| February | 30°C / 86°F | 19°C / 66°F | 24 mm | 5 | — |
| March | 28°C / 83°F | 18°C / 65°F | 39 mm | 8 | — |
| April | 24°C / 75°F | 15°C / 59°F | 39 mm | 10 | — |
| May | 21°C / 69°F | 12°C / 54°F | 78 mm | 12 | — |
| June | 18°C / 65°F | 11°C / 51°F | 102 mm | 15 | — |
| July | 17°C / 63°F | 10°C / 51°F | 112 mm | 20 | — |
| August | 18°C / 64°F | 10°C / 50°F | 96 mm | 17 | — |
| September | 19°C / 67°F | 11°C / 51°F | 46 mm | 15 | — |
| October | 22°C / 71°F | 13°C / 55°F | 38 mm | 12 | — |
| November | 25°C / 78°F | 15°C / 59°F | 18 mm | 8 | — |
| December | 29°C / 83°F | 18°C / 64°F | 8 mm | 4 | — |
Other cities with similar September weather
🌍 See the full ranked list of climate twins for Perth in September →
Frequently asked questions
How hot is Perth in September?
In September, Perth averages a high of 19°C (67°F) and a low of 11°C (51°F) — generally mild and pleasant.
Does it rain a lot in Perth in September?
September is quite rainy in Perth, with about 15 rainy days on average.
Is September a good time to visit Perth?
September is mild and pleasant but on the rainy side. It suits travelers who are comfortable with mild and pleasant weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for Perth in September?
Pack light layers for warm days and cooler evenings, plus a compact umbrella or rain jacket. See the full September packing list for Perth for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.