Weather in Sydney in December
December in Sydney is mild with average temperatures around 21.7°C (71.1°F). Moderate rainfall of 72mm spread over 11 days.
Data Note: Temperature values are 2001–2020 satellite/reanalysis grid averages from NASA POWER and may differ from airport station normals by a few degrees.
Temperature
High
24.5°C
76.1°F
Low
18.8°C
65.8°F
Precipitation
72 mm
2.8 inches
~11 rainy days
Conditions
Humidity
73%