Australia
Sydney in December: weather, sea & travel advice
This month's data profile
Rain shapes the decision
Sydney in December is climatically well suited to city breaks, beach holidays, family holidays and active holidays and hiking. The average daily high is around 24 °C, and the sea is about 21 °C. With about 11 rainy days it is wet.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
80/100 · #1
Warmth
#3
Dryness
#8
Sun
#1
Sea warmth
#5
Published best categories: Overall, Beach, Family
Sydney · DecemberPhoto: Dietmar Rabich · CC BY-SA 4.0Climate facts
- Average high
- 24 °C
- Average low
- 19 °C
- Sea
- 21 °C
- Rainy days (est.)
- 11 rainy days (est.)
- Sun (est.)
- 8 h/day
- Humidity
- 73 %
Climate evidence with direct month comparison
The highlighted row is the selected month. Precipitation total and rainy days are separate monthly averages.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Precipitation mm | Sun h/day (est.) | Humidity % | Wind m/s | Sea °C | Score |
|---|---|---|---|---|---|---|---|---|---|
| November | 23 | 17 | 12 | 86 | 7.7 | 73 | 3.2 | 20 | 75 |
| December (selected) | 24 | 19 | 11 | 74 | 8.3 | 73 | 3.1 | 21 | 80 |
| January | 26 | 20 | 13 | 91 | 8.0 | 75 | 3.3 | 23 | 79 |
How do the previous and next months compare?
Baseline: December (80/100)
Positive and negative values show the change from the selected month.
| Score Δ | Average high Δ | Average low Δ | Rainy days Δ | Rain Δ | Sun Δ | Humidity Δ | Wind Δ | Sea Δ | |
|---|---|---|---|---|---|---|---|---|---|
| November | -5 | -1.6 °C | -1.7 °C | +0.5 | +12 mm | -0.6 h | -0.7 % | ±0 m/s | -1.3 °C |
| January | -1 | +1.3 °C | +1.6 °C | +1.6 | +16.8 mm | -0.3 h | +1.9 % | +0.1 m/s | +1.4 °C |
All twelve months in context
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Useful next decisions
Frequently asked questions
How warm is Sydney in December?
The average daily high is around 24 °C, with an average daily low of about 19 °C.
Can you swim in Sydney in December?
The sea is about 21 °C (swimmable).
Does it rain a lot in Sydney in December?
The curated estimate is about 11 rainy days per month, not a directly measured long-term average. Total precipitation averages around 74 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Sydney?
By the climate score, January, February, April and December are the strongest months for Sydney. For a beach trip: January, February, March and December. December is one of them.