Hornsby
December
Weather in Hornsby for December 2025
Your guide to Hornsby weather in December - trends and predictions
Until now, December 2025 in Hornsby is slightly cooler than the historical average by -1.2 °C.
Expect cooler weather in the next days in Hornsby with the forecast suggesting a temperature of 26.7 °C, lower than the historical average.
In general, the average temperature in Hornsby at the beginning of December is 28 °C. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 25.7 °C by the end of December.
The climate of Hornsby in December is notably wet, with an average of 12 rainy days, and a total of 57.1 mm of precipitation.
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Temperatures
Rain 🌧️
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19
Dry days
12
Rainy days
0
Snow days
27°/18°
Temperatures
22 km/h
Avg max wind
68 %
Avg humidity
Hornsby Weather December
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Temperatures trend during December in Hornsby
See the weather trend as well as the moving average line
December weather in Hornsby day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Dec. |  Patchy rain possible | 25° /16° | 2.4 mm | 9 | |
| 2 Dec. |  Sunny | 26° /15° | 4 mm | 9 | |
| 3 Dec. | Patchy rain possible | 27° /16° | 1.2 mm | 9 | |
| 4 Dec. | Patchy rain possible | 25° /17° | 0.2 mm | 9 | |
| 5 Dec. | Sunny | 31° /17° | 0 mm | 11 | |
| 6 Dec. | Sunny | 32° /20° | 0.9 mm | 10 | |
| 7 Dec. | Sunny | 30° /18° | 0.9 mm | 10 | |
| 8 Dec. | Patchy rain possible | 29° /18° | 0.3 mm | 9 | |
| 9 Dec. | Patchy rain possible | 31° /19° | 0.3 mm | 10 | |
| 10 Dec. | Patchy rain possible | 26° /19° | 2.2 mm | 9 | |
| 11 Dec. | Patchy rain possible | 23° /18° | 4.9 mm | 8 | |
| 12 Dec. | Patchy rain possible | 26° /18° | 4.4 mm | 9 | |
| 13 Dec. |  Partly cloudy | 29° /17° | 1 mm | 10 | |
| 14 Dec. | Sunny | 33° /21° | 0 mm | 11 | |
| 15 Dec. | Patchy rain possible | 20° /17° | 1 mm | 1.7 | |
| 16 Dec. | Patchy rain possible | 18° /17° | 2.1 mm | 0.7 | |
| 17 Dec. | Patchy rain possible | 23° /18° | 0.9 mm | 3.2 | |
| 18 Dec. | Sunny | 29° /16° | 0 mm | 3.7 | |
| 19 Dec. | Sunny | 34° /19° | 0 mm | 10 | |
| 20 Dec. |  Moderate rain | 27° /19° | 9.9 mm | 8 | |
| 21 Dec. | Sunny | 33° /19° | 0 mm | 10 | |
| 22 Dec. | Moderate rain | 31° /20° | 5.9 mm | 8 | |
| 23 Dec. | Sunny | 34° /20° | 0 mm | 10 | |
| 24 Dec. | Patchy rain possible | 21° /18° | 0.5 mm | 7 | |
| 25 Dec. | Patchy rain possible | 22° /17° | 0.1 mm | 7 | |
| 26 Dec. | Partly cloudy | 25° /15° | 0 mm | 8 | |
| 27 Dec. | Partly cloudy | 31° /17° | 0 mm | 9 | |
| 28 Dec. | Partly cloudy | 26° /21° | 0 mm | 9 | |
| 29 Dec. |  Patchy light drizzle | 27° /17° | 0.8 mm | 9 | |
| 30 Dec. | Patchy rain possible | 26° /18° | 1.3 mm | 9 | |
| 31 Dec. | Patchy rain possible | 23° /18° | 0.5 mm | 8 | |
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Important Notice
Our weather forecast for Hornsby in December is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Hornsby forecast closer to your planned date for the most up-to-date weather information.
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Hornsby in December - FAQ
What are the expected maximum and minimum temperatures in Hornsby during December?
During December, expect a variety of temperatures with highs around 27° and lows near 18°, suitable for diverse activities and preferences.
How much rainfall should be expected in Hornsby during December?
Moderate rainfall is anticipated in Hornsby during December, with a total of 57.1 mm spread over approximately 12 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Hornsby during December?
The average wind speed in Hornsby during December is 22 km/h, suggesting breezy to windy conditions, depending on your activities.
December rainfall patterns in Hornsby
Explore the daily rainfall trends and prepare for Hornsbys December weather 💧
Typically, Hornsby has 12 rainy days in December with a total of 57.1 mm of rainfall.
UV exposure in Hornsby during December
Stay informed about UV levels for safe outdoor activities throughout the month of December ☀️
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