Cairns weather in December
December in Cairns: sweltering, soaked, with clean air — a great time to visit.
#9 of 12 months in Cairns · #214 of 604 destinations to visit in December · comfort 76/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Cairns climate normals — December
| Daytime high | 29°C / 85°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 25°C / 76°F | |
| Feels like (high) | 35°C / 95°F | |
| Rainfall | 305 mm / 12 in | ⛈ soaked |
| Rainy days | 16 days | |
| Humidity | 84% | 💦 very humid |
| Dew point | 23°C / 74°F | |
| Sunshine | 10.6 h/day | |
| Daylight | 13.1 h | |
| Wind | 15 km/h / 9 mph | |
| Air quality (US AQI) | 25 | 🍃 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 December — FAQ
- Is December a good time to visit Cairns?
- December in Cairns: sweltering, soaked, with clean air — a great time to visit. It ranks #9 of 12 months for Cairns on SeasonMap's comfort score (76/100).
- What is the weather like in Cairns in December?
- In December, Cairns averages a daily high of 29.4°C and a low of 24.6°C, with about 305.1 mm of rain over roughly 16.2 rainy days.
- What is the air quality in Cairns in December?
- Cairns has a mean US Air Quality Index of about 25 in December.