Hornsby Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Hornsby.
Climate overview of Hornsby
Temperatures in Hornsby, New South Wales, Australia, shift moderately through the seasons. The warmest month is January at 28°C (82°F), and the coolest is July at 18°C (64°F).
Annual rainfall is moderate at around 811 mm (32 in), with February being the wettest month. The sunniest month is December, with 8.6 hours of sunshine per day on average.
Hornsby Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Hornsby - and find the best time to visit.
Monthly Temperature in Hornsby
In Hornsby, seasonal changes bring about a moderate variation in temperatures. Average daytime temperatures reach a comfortable 28°C (82°F) in January. In July, the coolest month of the year, temperatures drop to a pleasant 18°C (64°F).
At night, temperatures range from around 19°C (66°F) in January to 8°C (46°F) in July.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Hornsby
Generally, Hornsby receives mid-range precipitation levels, with 811 mm (32 in) annually. Hornsby can be quite wet during February, receiving approximately 106 mm (4.2 in) of precipitation over 12 rainy days.
In contrast, during the driest month (July), you will experience much drier conditions, with 46 mm (1.8 in) of precipitation spread across 8 rainy days. For more details, please visit our Hornsby Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Hornsby
Hornsby experiences moderate variation in sunshine hours across the seasons. With 8.6 hours daily sunshine in December, it dips to 6.0 hours in May, offering a balanced mix of sunny and overcast days.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Hornsby by Month
The relative humidity is moderate throughout the year in Hornsby.
The city experiences its highest humidity in February, reaching 62%. In August, the humidity drops to its lowest level at 48%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Hornsby
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: January, March, April, May, August, September, October, November and December
- Warmest weather: January, February and December
- Most sunshine: October and December
- Fewest rainy days: July, August, September and December
Frequently asked questions about the climate in Hornsby
What is the best time to visit Hornsby?
January, March, April, May, August, September, October, November and December typically offer the most optimal weather in Hornsby. In contrast, February, June and July tend to have less optimal conditions.
What temperatures can I expect in Hornsby?
Daytime highs range from 18°C (64°F) in July to 28°C (82°F) in January. Nighttime lows range from 8°C (46°F) to 19°C (66°F).
How much rain does Hornsby get?
Annual rainfall is around 811 mm (32 in). February is the wettest month with 106 mm (4.2 in), while July is the driest with 46 mm (1.8 in).
How sunny is Hornsby?
Hornsby receives around 2,644 hours of sunshine per year. December is the sunniest month with 257 hours, while May is the cloudiest with just 180 hours. Overall, Hornsby enjoys abundant sunshine.
Hornsby 3-Day Forecast
Hornsby on the map
Hornsby is highlighted - select any city to see its climate.
Popular this month
Where to go in September - average daytime high across popular destinations.
Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
An alternative way to discover Sydney
We have made an overview of the sights in Sydney that you must see if you want to visit Sydney in an alternative way.
The most relaxed and alternative area of Australia is called the Byron Shire
The Byron Shire is one of the most pretty areas in the world. Not only in terms on natural beauty, also the relaxed vibe and people make this an area that remains close to your heart.
Sail the Whitsunday islands
The best travel period to sail the Whitsunday islands is “winter” between June and October, with pleasant temperatures around 23 degrees Celsius (74 Fahrenheit).
The best dive spots in Australia
Explore Australia's best dive spots: from the Great Barrier Reef to HMAS Perth. Discover vibrant corals, marine life, and historic wrecks.