Weather in Sydney for December 2025
Until now, December 2025 in Sydney has been nearly identical to the historical average, with a temperature of 24.1 °C (showing only a slight deviation of 0.4 °C).
The forecast for the next days in Sydney predicts temperatures to be around 24 °C, close to the historical average.
In general, the average temperature in Sydney at the beginning of December is 24 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 22.9 °C by the end of December.
Sydney experiences heavy rainfall in December, with over 20 rainy days and an average total precipitation 68 mm.
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Sydney Weather December
Temperatures trend during December in Sydney
December weather in Sydney day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Dec. |  Patchy rain possible | 23° /17° | 3 mm | 8 | |
| 2 Dec. |  Sunny | 23° /16° | 2.2 mm | 8 | |
| 3 Dec. | Patchy rain possible | 24° /16° | 1.3 mm | 8 | |
| 4 Dec. | Patchy rain possible | 22° /17° | 0.4 mm | 8 | |
| 5 Dec. |  Partly cloudy | 25° /17° | 0.1 mm | 9 | |
| 6 Dec. | Patchy rain possible | 25° /19° | 0.7 mm | 8 | |
| 7 Dec. | Patchy rain possible | 26° /17° | 1.6 mm | 8 | |
| 8 Dec. | Patchy rain possible | 23° /17° | 0.2 mm | 8 | |
| 9 Dec. | Patchy rain possible | 24° /17° | 1.9 mm | 8 | |
| 10 Dec. | Patchy rain possible | 23° /17° | 3.5 mm | 8 | |
| 11 Dec. | Patchy rain possible | 22° /17° | 3.5 mm | 8 | |
| 12 Dec. | Patchy rain possible | 23° /17° | 2.8 mm | 8 | |
| 13 Dec. | Patchy rain possible | 25° /16° | 0.4 mm | 9 | |
| 14 Dec. | Sunny | 25° /18° | 1.2 mm | 8 | |
| 15 Dec. | Patchy rain possible | 20° /17° | 1.5 mm | 1.8 | |
| 16 Dec. | Patchy rain possible | 19° /17° | 2.3 mm | 0.8 | |
| 17 Dec. | Patchy rain possible | 22° /18° | 0.8 mm | 3.2 | |
| 18 Dec. | Sunny | 25° /17° | 0 mm | 3.7 | |
| 19 Dec. | Sunny | 28° /20° | 0 mm | 9 | |
| 20 Dec. |  Moderate rain | 25° /20° | 5.1 mm | 8 | |
| 21 Dec. | Sunny | 30° /19° | 0 mm | 9 | |
| 22 Dec. | Moderate rain | 27° /20° | 7.2 mm | 8 | |
| 23 Dec. | Sunny | 33° /20° | 0.1 mm | 10 | |
| 24 Dec. | Patchy rain possible | 20° /18° | 0.6 mm | 7 | |
| 25 Dec. | Partly cloudy | 21° /18° | 0.1 mm | 8 | |
| 26 Dec. | Partly cloudy | 22° /17° | 0 mm | 8 | |
| 27 Dec. |  Cloudy | 25° /18° | 0 mm | 8 | |
| 28 Dec. | Partly cloudy | 23° /21° | 0 mm | 9 | |
| 29 Dec. | Patchy rain possible | 23° /18° | 1.5 mm | 7 | |
| 30 Dec. | Patchy rain possible | 23° /18° | 3.4 mm | 7 | |
| 31 Dec. | Patchy rain possible | 23° /18° | 1 mm | 7 | |
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Sydney in December - FAQ
Sydney water temperatures in December
The average water temperature of the Pacific Ocean near Sydney in December is 19.8 °C. Temperatures remain fairly consistent throughout the month.
- What is the water temperature in Sydney in December?
- The average water temperature in Sydney in December is 19.8 °C.
- Can you swim in Sydney in December?
- Refreshing and invigorating. Expect to feel chilled after 10–20 minutes; a shorty wetsuit extends water time, especially at dawn.
December rainfall patterns in Sydney
UV exposure in Sydney during December
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