December · Australia
Best time to visit Adelaide in December Weather, crowds & prices
Weather in Adelaide in December
Average temperature 20°C, 22 mm of rain, about 30 days with 6+ hours of sunshine and 56% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
December score
10.0/10
Ranked #2 of 12 months
- Avg temp
- 20°C
- Rainfall
- 22 mm
- Humidity
- 56%
- Days with 6h+ sun
- 30
- Crowd Density
- Peak Tourist Rush
- Average Expenses
- $$$ · Peak Season Rates ($$$)
December in Adelaide scores 10.0/10 for sightseeing and cultural travel - one of the top 12-month picks (#2). Expect around 20°C, 22 mm of rain, and roughly 30 days with 6+ hours of sunshine this month.
Adelaide pairs a gridded parkland centre with wine regions and Gulf St Vincent beaches within an hour.
December ranks 2nd of 12 for Adelaide — one of the best windows
At 20°C (68°F) this is comfortable city weather in December, with sightseeing easiest before lunch and after the afternoon peak.
With around 22 mm of rain, any showers tend to pass through rather than settle in; about 30 days with 6+ hours of sunshine and 14.5 hours of daylight fill the rest.
On our climate-comfort scale this is one of the strongest months of the year for Adelaide at 10/10 (2nd of 12), just behind February at 10/10.
Pack light clothing, a hat and real sun protection.
Budget for peak pricing, and this is one of the busiest months here. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Frequently asked
- What is the weather like in Adelaide in December?
- In December, Adelaide averages 20°C, 22 mm of rain, and about 30 days with 6+ hours of sunshine. Its climate-comfort score is 10.0/10.
- Is December a good time to visit Adelaide?
- December earns a 10.0/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Adelaide in December?
- Expect about 22 mm of rain in December. Average humidity is 56% and there are about 30 days with 6+ hours of sunshine.
Curated in Adelaide
Tickets & experiences
Things to do in Adelaide
Adelaide, Australia. Live activities and tours from GetYourGuide, matched to this destination.