AustraliaThe weather in December in Sydney
It's warm in December in Sydney with an average temperature of 27°C. Temperatures this month range from a low of 25°C to a high of 29°C. At night, you can expect temperatures between 18°C and 20°C.
Looking for sun? December isn’t a good month to be in Sydney. The temperature is nice, but there’s too much chance of rain.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in December for Sydney, Australia. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 41°C in 2019, Sydney reached the highest temperature in December over the past 10 years. The lowest daytime temperature in this month was 19°C in 2021. The extreme nighttime temperatures ranged from a lowest recorded value of 12°C to a highest value of 24°C.
Water temperature
The water temperature at Sydney is 25°C this month. Lovely temperature for a swim.
Rainfall amount
In December, there is an average of 137 mm of precipitation, spread over 16 days. The wind speed is around 4 Bft, mostly coming from the Southeast.
Daily weather in December for Sydney
Click on any day in December to get detailed info about the usual weather on that day in Sydney. Check out the historical temperatures and precipitation over the past 10 years on this day.
December weather comparison
| Sydney | New York | |
|---|---|---|
| Average temperature | 27°C | 9°C |
| Max. temperature | 29°C | 12°C |
| Min. temperature | 18°C | -5°C |
| Total precipitation | 137 mm | 133 mm |
| Rainy days | 16 days | 17 days |
Start of December
The month of December starts in Sydney with hot temps, averaging around 27°C during the day and nights around 19°C.
Mid December
By mid-December, daytime temps rise to around 28°C, with nights around 20°C. During this part of the month, you might see regular precipitation, but there will also be some sunny days.
End of December
By the end of December, the average daytime temperature in Sydney is around 28°C, while nighttime temps are about 20°C. Expect regular precipitation, but if you’re lucky, you’ll also get some dry and sunny days.
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UV index
The UV index is a maximum of 9 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Check out the climate of Sydney for all months and discover the best travel time
Curious about the weather in other parts of Australia? Check out the climate and weather for spots like Gold Coast, Melbourne, Cairns, or explore other destinations in Australia.
Temperature charts
These charts show the average temperatures in December in Sydney, Australia. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in December in Sydney
Temperature in December in Sydney over the years
Precipitation charts
These charts show the average amount of precipitation in December in Sydney, Australia. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in December in Sydney
Total precipitation in December in Sydney over the years
Daily UV index in December in Sydney
This chart shows the average daily UV index in December in Sydney, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Weather experiences in December in Sydney
Have you been to Sydney in December?
Share your weather experience in December in Sydney.
Average weather in Sydney by month
Click on a month below to see detailed weather info for Sydney. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.