SeasonScore
Adelaide, Australia
Photo: Unclespitfire · CC0

Australia

Adelaide in December

☀️ Summer

Pleasant and mostly dry.

🎒 Pack: sunglasses & hat

Best months: Mar (9.9), Dec (9.9), Feb (9.8)

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Why December scores 9.9What goes into the score

How it works
🌡️ 26° / 15°C🌧️ 28 mm💧 dew pt 9°🍃 PM2.5 5
  • Weather comfort50%10.0
    • ✓Comfortable temperatures (26°C highs / 15°C lows)
    • ✓Comfortable humidity (dew point 9.1°C)
    • ✓Mostly dry (~28 mm rain)
  • Air quality20%10.0
    • ✓Good (within WHO guideline) (PM2.5 ~5 µg/m³)
  • Seasonal hazards20%10.0
    • ·No notable seasonal hazards
  • Safety baseline10%8.5
    • ·Normal precautions
Compare monthsPut December side by side with another month
DecMar
Score9.9 Excellent9.9 Excellent
Season☀️ Summer🍂 Autumn
High / low26° / 15°26° / 15°
Rain28 mm25 mm
Humiditydew pt 9°dew pt 11°
PM2.55 µg/m³4 µg/m³

Typical-month data: NASA POWER (MERRA-2 reanalysis) 2015–2024 (modelled, not a forecast). Temperatures: Adelaide Airport weather-station normals. Rainfall: Adelaide Airport M.O. weather-station normals (national met service).

Holidays & crowdsDecember 2026

Long weekend

There's at least one long weekend. Domestic travel picks up and popular spots get busier over those days.

  • Christmas Day 25–27 Dec · 3 days off in a row

National holidays only; regional holidays and school breaks aren't included. Source: holidays (open-source public-holiday calendar).

Explore AdelaideEvents, sights, food & souvenirs

Check event dates locally

South Australia's capital, a relaxed, walkable city known for its festivals, food market and access to famous wine regions like the Barossa and McLaren Vale.

Events in December

No major events on our calendar for December.

Coming up later

Santos Tour Down UnderDate variesUsually mid-to-late January

A professional road cycling race that opens the international cycling season.

Why go: Free to watch along the roadside; expect road closures on stage days.

Where: Adelaide and surrounding regions

Adelaide FringeDate variesUsually mid-February to mid-March

One of the world's largest open-access arts festivals, with comedy, cabaret, music and street performance.

Why go: Accommodation fills fast; many shows are cheap and pop-up venues run late.

Where: Venues across the city

Adelaide FestivalDate variesUsually late February to mid-March

A curated international festival of theatre, music, dance and visual arts.

Why go: Overlaps with the Fringe and WOMADelaide, making March the busiest month.

Where: Theatres and venues across the city