Perth weather in August
August in Perth: cool, rainy, with clean air — an excellent time to visit.
#10 of 12 months in Perth · #257 of 604 destinations to visit in August · comfort 82/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Perth climate normals — August
| Daytime high | 18°C / 64°F | 🙂 cool |
|---|---|---|
| Nighttime low | 10°C / 49°F | |
| Feels like (high) | 15°C / 59°F | |
| Rainfall | 82 mm / 3.2 in | 🌧 rainy |
| Rainy days | 9 days | |
| Humidity | 76% | 💦 very humid |
| Dew point | 9°C / 48°F | |
| Sunshine | 9.4 h/day | |
| Daylight | 11 h | |
| Wind | 24 km/h / 15 mph | |
| Air quality (US AQI) | 32 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Perth in August — FAQ
- Is August a good time to visit Perth?
- August in Perth: cool, rainy, with clean air — an excellent time to visit. It ranks #10 of 12 months for Perth on SeasonMap's comfort score (82/100).
- What is the weather like in Perth in August?
- In August, Perth averages a daily high of 17.7°C and a low of 9.6°C, with about 81.5 mm of rain over roughly 9 rainy days.
- What is the air quality in Perth in August?
- Perth has a mean US Air Quality Index of about 32 in August.