Sydney weather in December (New South Wales, Australia)

You can expect very pleasant temperatures during the day in December. The average maximum daytime temperature in Sydney in December lies at 23.7°C (74.66°F). Usually it is the warmest month of the year. The average minimum temperature goes down to around 18.5°C (65.3°F) (often the minimum temperature is noted at night).

Rainfall during December is moderate with an average of 86mm (3.4 inches). There are generally around 10 rainy days. If you enjoy blue skies and sunshine, then this is a great time to go to Sydney with 257 hours of sun during the entire month. December is known as one of the best months to visit Sydney.


Sydney, monthly averages in December

Show in Celsius
Min Temperature 65 °F  
Max Temperature 74 °F  
Water Temperature 68 °F *  
Chance of Rain 34%  
Precipitation 3 in  
Rainy days 10 days  
Humidity 58% *  
Sunshine 257 hrs *  
Percentage Sunshine 55% *  

Where to stay in Sydney

Where to go in Australia in December

Find out more about the weather in Australia in December and which places have the best weather conditions in this month.

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Legend perfect weather pleasant tolerable unpleasant poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20-29ºC / 68-84ºF and not too much precipitation (less than 90mm / 3.5inches a month).

So what to wear in December? Visitors traveling to Sydney should plan on bringing a totally waterproof coat since it will often be raining. However, also bring your summer cloths because it can be very nice and warm. With a water temperature of around 20.0°C (68°F), this is a great month to swim so bring your swimwear.

What To Do

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

Outdoor sports

Interested in more climate information?

Weather and Climate provides you with all the information you need about the climate in Sydney.

Our site offers climate and forecast data for every country in the world. Are you going to Australia? On this website you can find historical weather averages for many cities in Australia. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal climate conditions. Find out where to go with our weather planner.