Sydney in December

In December, Sydney, Australia is typically warm, with average highs around 25°C / 76°F and lows near 18°C / 64°F with mild nights. Rainfall totals roughly 56.2 mm (2.21 in) over 13 rainy days. It's among the warmest months, UV at its seasonal peak; the longest days of the year.

Highlights

• UV levels are very high — Sun protection is essential.
• Daylight averages about 14.4 hours. Sunrise is typically around 05:39 and sunset near 20:01.
• Skies trend toward a mix of sun and cloud.
• Expect a touch of humidity, which can feel muggy on warmer days.
• Winds are typically fresh, averaging around 42 km/h (26.1 mph) with gusts up to about 108 km/h (67.1 mph).
• Snowfall is unlikely.

Trip tips

• High UV — carry SPF 50+, hat and sunglasses; plan a shade break around midday.
• Expect showers — pack a light [waterproof](/australia/sydney/what-to-wear) and quick‑dry footwear.
• Gusty days are possible — a windproof layer helps on exposed coastlines.
• Muggy at times — choose breathable fabrics and stay hydrated.