Hornsby Weather in December

Thinking of visiting Hornsby in December? Expect high temperatures reaching 27°C (81°F) during the day, dropping to 17°C (63°F) at night, and note that quite a bit of rainfall is likely.

Rainfall in Hornsby in December

Typically around 10 days of rainfall are expected, averaging 65 mm (2.6 in) for the month. A fairly balanced picture this month, some wet days but nothing too extreme in terms of intensity.

Temperature in Hornsby in December

December is a good time to be in Hornsby. Days are perfect, reaching 27°C (81°F), with nights around 17°C (63°F). The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. Nights cool down to 17°C (63°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.

Sunshine in Hornsby in December

The city usually sees around 257 hours of sunlight, indicating many sunny days — a great month for sightseeing.

If you favor pleasant temperatures and minimal rainfall, December is one of the best months to visit Hornsby.

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Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Australia, check out our Hornsby's climate page.

Hornsby Temperature in December

Min Temperature 17°C (63°F)  

Max Temperature 27°C (81°F)  

Chance of Rain 34%  

Precipitation 65 mm (2.6 in)  

Rainy days 10 days  

Humidity 58% *  

Sunshine 257 hours *  

Percentage Sunshine 55% *  

* Data from: Sydney, Australia (28 KM, 17 Miles).

What to Wear in Hornsby in December

Warm but pleasant conditions in Hornsby in December. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Wet weather is likely, so pack waterproof gear for multiple rainy days. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.

What To Do in Hornsby in December

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

9/10

Cycling

8/10

Walking

8/10

Camping

8/10

Outdoor sports

8/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Australia, check out our Hornsby's climate page.

More climate data for Hornsby

Temperature Rainfall Sunshine Humidity

See the full Hornsby climate overview or explore weather in Australia.