SeasonScore
Sydney, Australia
Photo: lights+shades · CC BY-SA 2.0

Australia

Sydney in December

☀️ Summer

Pleasant and some showers. Watch for wildfire & storm risk.

🎒 Pack: sunglasses & hat

Best months: Sep (9.4), Jul (9.3), Aug (9.3)

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Why December scores 8.5What goes into the score

How it works
🌡️ 26° / 18°C🌧️ 67 mm💧 dew pt 17°🍃 PM2.5 11
  • Weather comfort9.4
    • ✓Comfortable temperatures (26°C highs / 18°C lows)
    • ✓Slightly humid (dew point 16.6°C)
    • ✓Mostly dry (~67 mm rain)
  • Air quality9.1
    • ✓Good (within WHO guideline) (PM2.5 ~11 µg/m³)
  • Seasonal hazards5.5
    • !Wildfire: seasonal wildfire risk (reviewed city profile)
    • !Storm: occasional storm risk (reviewed city profile)
  • Safety baseline8.5
    • ·Normal precautions
Compare monthsPut December side by side with another month
DecSep
Score8.5 Excellent9.4 Excellent
Season☀️ Summer🌷 Spring
High / low26° / 18°22° / 12°
Rain67 mm59 mm
Humiditydew pt 17°dew pt 10°
PM2.511 µg/m³10 µg/m³

Typical-month data: NASA POWER (MERRA-2 reanalysis) 2015–2024 (modelled, not a forecast). Temperatures: Sydney Airport weather-station normals. Rainfall: Sydney Airport 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 SydneyEvents, sights, food & souvenirs

Check event dates locally

Australia's largest city, set around a huge natural harbour, known for the Opera House, Harbour Bridge and ocean beaches.

Events in December
New Year's Eve fireworksEvery year31 December every year

Large fireworks over the Harbour Bridge and Opera House at 9pm and midnight.

Why go: Foreshore vantage points fill up many hours in advance and some require tickets.

Where: Sydney Harbour

Sydney to Hobart Yacht Race startEvery year26 December every year

The ocean yacht race starts from the harbour on Boxing Day.

Why go: Headlands like South Head are popular viewing spots.

Where: Sydney Harbour

Coming up later

Sydney Gay and Lesbian Mardi GrasDate variesUsually February to early March, parade on a Saturday

A festival culminating in a large night-time parade.

Why go: The parade draws big crowds along Oxford Street, so arrive early.

Where: Oxford Street, Darlinghurst

Vivid SydneyDate variesUsually late May to mid-June

A festival of light projections, installations, music and ideas.

Why go: Evening crowds around Circular Quay are very heavy, especially on weekends.

Where: Circular Quay, The Rocks, Darling Harbour and beyond

Whale migrationDate variesUsually May to November

Humpback whales pass Sydney heading north and later south.

Why go: Coastal headlands are good for land-based spotting.

Where: Off the coast; cruises from Circular Quay and Manly