Perth in September
7.4out of 10
Possible, with caveats
Mild: highs around 19°C. Frequent rain: about 9 rainy days.
19°CAvg high
12°CAvg low
9Rainy days (54 mm)
11:49 hDaylight
06:16Sunrise · 18:05 Sunset
Why this score
- Mild: highs around 19°C
- Frequent rain: about 9 rainy days
What to wear and pack
- Layers you can add or remove
- Rain jacket or compact umbrella
How reliable is the forecast?
Rain in September varies a lot between years (±3.3 rainy days), so check the forecast closer to your trip. Averages cover 30 years (1991–2020). Individual days can differ a lot.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | 29°C | 20°C | 17 mm | 2 | – | – | 8.9 |
| February | 29°C | 20°C | 17 mm | 2 | – | – | 8.9 |
| March | 27°C | 19°C | 18 mm | 2 | – | – | 8.8 |
| April | 24°C | 16°C | 24 mm | 4 | – | – | 8.6 |
| May | 21°C | 14°C | 67 mm | 8 | – | – | 7.8 |
| June | 18°C | 12°C | 99 mm | 11 | – | – | 7.0 |
| July | 17°C | 11°C | 102 mm | 13 | – | – | 6.6 |
| August | 18°C | 11°C | 89 mm | 11 | – | – | 6.9 |
| September | 19°C | 12°C | 54 mm | 9 | – | – | 7.4 |
| October | 21°C | 14°C | 28 mm | 5 | – | – | 8.3 |
| November | 24°C | 16°C | 18 mm | 4 | – | – | 8.6 |
| December | 27°C | 18°C | 9 mm | 2 | – | – | 8.9 |
Frequently asked questions
How hot is Perth in September?
Daytime highs average 19°C and nights about 12°C.
When is the best time to visit Perth?
The best months are January, February, December, March.