Cairns weather in August
August in Cairns: warm, a little rain, with clean air — an excellent time to visit.
#4 of 12 months in Cairns · #156 of 604 destinations to visit in August · comfort 86/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Cairns climate normals — August
| Daytime high | 24°C / 75°F | 🌤 warm |
|---|---|---|
| Nighttime low | 19°C / 67°F | |
| Feels like (high) | 25°C / 77°F | |
| Rainfall | 39 mm / 1.5 in | 🌦 some rain |
| Rainy days | 8 days | |
| Humidity | 78% | 💦 very humid |
| Dew point | 17°C / 62°F | |
| Sunshine | 9.9 h/day | |
| Daylight | 11.6 h | |
| Wind | 17 km/h / 11 mph | |
| Air quality (US AQI) | 27 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Cairns?
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Cairns in August — FAQ
- Is August a good time to visit Cairns?
- August in Cairns: warm, a little rain, with clean air — an excellent time to visit. It ranks #4 of 12 months for Cairns on SeasonMap's comfort score (86/100).
- What is the weather like in Cairns in August?
- In August, Cairns averages a daily high of 23.9°C and a low of 19.4°C, with about 38.5 mm of rain over roughly 7.8 rainy days.
- What is the air quality in Cairns in August?
- Cairns has a mean US Air Quality Index of about 27 in August.