Adelaide weather in December
December in Adelaide: warm, dry, with clean air — one of the best months to visit.
#1 of 12 months in Adelaide · #3 of 604 destinations to visit in December · comfort 95/100 (tier S)
Updated June 2026 · climate normals from ERA5 reanalysis
Adelaide climate normals — December
| Daytime high | 25°C / 78°F | 🌤 warm |
|---|---|---|
| Nighttime low | 16°C / 60°F | |
| Feels like (high) | 25°C / 77°F | |
| Rainfall | 19 mm / 0.8 in | ☀️ dry |
| Rainy days | 3 days | |
| Humidity | 61% | 💧 humid |
| Dew point | 11°C / 52°F | |
| Sunshine | 12.4 h/day | |
| Daylight | 14.5 h | |
| Wind | 25 km/h / 16 mph | |
| Air quality (US AQI) | 26 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Adelaide in December — FAQ
- Is December a good time to visit Adelaide?
- December in Adelaide: warm, dry, with clean air — one of the best months to visit. It ranks #1 of 12 months for Adelaide on SeasonMap's comfort score (95/100).
- What is the weather like in Adelaide in December?
- In December, Adelaide averages a daily high of 25.4°C and a low of 15.5°C, with about 19.3 mm of rain over roughly 3.2 rainy days.
- What is the air quality in Adelaide in December?
- Adelaide has a mean US Air Quality Index of about 26 in December.