Verdict: Excellent month
Sydney Weather in December
December hits the sweet spot in Sydney — highs around 25°C (77°F), ideal for a full day on foot. Expect showers on roughly 12 days of the month — rarely trip-ruining, worth planning around. Overall, December is one of the best months of the year to be in Sydney.
Average high
25°C / 77°F
Average low
17°C / 63°F
Rain days
~12
Precipitation
83 mm
What to pack for Sydney in December
- Summer clothes, plus one light layer for air-con and evenings
- Rain gear is non-negotiable — expect rain on roughly 12 days
- Comfortable walking shoes — every guide on this site assumes you'll use them
December against the rest of the year
Warmest in Sydney: Jan (26°C / 79°F) · Coolest: Jun (17°C / 63°F) · Wettest: Mar (~17 rain days)
26°
19°
Jan
26°
19°
Feb
25°
17°
Mar
22°
14°
Apr
19°
11°
May
17°
8°
Jun
17°
8°
Jul
19°
9°
Aug
21°
11°
Sep
22°
13°
Oct
23°
15°
Nov
25°
17°
Dec
Daily highs / lows in °C · bars show rain days per month · ERA5 climate normals (2020–2024)