What to expect in Sydney in December
December is one of the best times to visit Sydney. Expect 26° / 18°, the biggest crowds of the year and premium prices.
Sydney weather in December
Typical conditions in Sydney during December, based on long-run climate normals rather than any single year. Treat it as a planning guide, not a forecast.
| Average high | 26°C 79°F |
|---|---|
| Average low | 18°C 64°F |
| Rainfall | Moderate 45/100 |
| Total rainfall | 79 mm3.1 in |
| Rainy days | 11 |
| Sea temperature | 21°C 71°F |
| Daylight | 14 h 23 min |
| How it feels | Warm and comfortable |
Average highs sit around 26°C with lows near 18°C. Rainfall is moderate; the odd shower is likely.
Crowds & demand
Crowd levels are High for Sydney — the biggest crowds of the year.
Prices & value
This month counts as high season: premium prices.
What to pack
Light layers for 26°C days and something with sleeves for evenings, which cool to around 18°C.
What it costs
This is peak pricing for Sydney. Expect to pay a premium on flights and accommodation, and to book considerably further ahead than usual. Compared with the most expensive month of the year, you are looking at roughly 6% less.
Who this month suits
- Travellers who want the most reliable weather
- Visitors who want to catch a festival
- Families tied to school holidays
Events & what’s on
Look out for New Year’s Eve Fireworks while you’re there.
- New Year’s Eve Fireworks — Harbour Bridge fireworks headline one of the world's biggest NYE shows.
Sydney in December compared with nearby months
If your dates are flexible by a few weeks, this is what shifting them actually buys you.
| Month | Temp | Crowds | Price | Score |
|---|---|---|---|---|
| October | 22° / 13° | Moderate | $$ | 61 |
| November | 24° / 16° | Moderate | $$ | 61 |
| December · This month | 26° / 18° | High | $$$ | 46 |
| January | 26° / 19° | High | $$$ | 43 |
| February | 26° / 19° | High | $$$ | 49 |
These months score higher for Sydney on the same blend of weather, crowds and price. Same destination, better odds.
Or go somewhere else in December
If the destination is negotiable but the month is not, these places are at their best in December.
Figures are climate normals and modelled estimates — a planning guide, not a forecast. We separate fact, estimate and recommendation. Updated October 2026
