Castle Hill Weather in December

December in Castle Hill sees daytime temperatures around 28°C (82°F) and lows of 17°C (63°F) at night. With around 63 mm (2.5 in) of rainfall expected, it's worth packing a rain jacket.

Rainfall in Castle Hill in December

Historically, the month has about 10 days of rain, averaging 63 mm (2.5 in) in total. Rain this month is fairly typical, a standard mix of wet and dry days with no particularly heavy or persistent showers.

Temperature in Castle Hill in December

December is a good time to be in Castle Hill. Days are perfect, reaching 28°C (82°F), with nights around 17°C (63°F). December is in the summer season. This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. With lows of 17°C (63°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.

Sunshine in Castle Hill in December

There are approximately 257 hours of sunshine this month, resulting in mostly clear days.

So this is a great month to visit if you prefer dry days with pleasant temperatures.

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 Castle Hill's climate page.

Castle Hill Temperature in December

Min Temperature 17°C (63°F)  

Max Temperature 28°C (82°F)  

Chance of Rain 34%  

Precipitation 63 mm (2.5 in)  

Rainy days 10 days  

Humidity 58% *  

Sunshine 257 hours *  

Percentage Sunshine 55% *  

* Data from: Sydney, Australia (29 KM, 18 Miles).

What to Wear in Castle Hill in December

Warm but pleasant conditions in Castle Hill 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. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.

What To Do in Castle Hill 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 Castle Hill's climate page.

More climate data for Castle Hill

Temperature Rainfall Sunshine Humidity

See the full Castle Hill climate overview or explore weather in Australia.