Sydney Weather in December – Average Temperature and Rainfall
- High
- 25.9°
- Low
- 17.6°
- Rainfall
- 65 mm
- Rainy season
- 10d
- max
- 40.5°
- min
- 12.1°
December
- Early
- 25.6° 19.4 mm
- Mid
- 25.9° 26.5 mm
- Late
- 26.0° 19.3 mm
Summary
The climate figures for Sydney are averaged from 2016–2025 observations (10 years). Annual rainfall averages about 1,019 mm.
The rainy season runs January–March. The wettest month is March with 157.3 mm across 16 rain days; the driest is September at just 53.9 mm.
The hottest month is January (average high 26.5°C) and the coolest is June (16.8°C).
The most comfortable time to visit Sydney is September — less rain and milder heat.
Monthly averages
Common questions
Will it rain in Sydney today?
Yes. Rain is expected around 19:00–00:00, totalling roughly 1.2 mm.
How hot is it in Sydney today?
Between 15°C and 28°C, with a felt maximum of 25°C.
What is the weather in Sydney tomorrow?
Tomorrow: light drizzle, 15–17°C, with a 61% chance of rain.