Temperatures in December
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.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Sydney in December. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of December
The month of December starts in Sydney with hot temperatures, averaging around 27°C during the day and nights close to 19°C. A few showers might pop up in the first days of the month, but the weather remains mostly sunny and dry.
Since temperatures can differ between day and night, it’s a good idea to dress in layers.
Mid-December
By mid-December, the average daytime temperature rises to around 28°C, with nights close to 20°C. During this part of the month, you can expect regular precipitation, but there’ll also be some sunny days.
Temperatures vary between day and night, so it’s smart to wear layers.
End of December
By the end of December, the average daytime temperature in Sydney will be around 28°C, with nights close to 20°C. There’s regular precipitation, but with a bit of luck, you’ll also get some dry and sunny days.
As it gets cooler in the evening, it’s best to wear layers.
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Water temperature
The water temperature at Sydney is 25°C this month. Lovely temperature for a swim.
Precipitation in December
In December, there is an average of 137 mm of precipitation, spread over 9 days. The wind speed is around 4 Bft, mostly coming from the Southeast.
The average precipitation chance is 29% per day this month. Though it seems pretty low, the weather’s variable. Some days have higher and others lower precipitation chances, which lowers the average.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in December for Sydney. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
Sydney in December |
London | ||
|---|---|---|---|
 Average Temperature |
27°C | 9°C | |
 High Temp |
29°C | 11°C | |
| Low Temp |
25°C | 8°C | |
 Total Precipitation |
137 mm | 67 mm | |
| Rainy Days |
9 days | 10 days | |
November
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.
Is December a good time to visit Sydney?
After some sun? Then December isn’t the best time to be in Sydney. The temperature is pleasant, but there’s too much chance of rain this month.
Temperature records for Sydney in December
With 41°C, Sydney hit the highest temperature in the last 10 years in December 2019. The lowest daytime temperature in this month was 19°C in 2021. The extreme night temperatures ranged from a low of 12°C to a high of 24°C.
Check out the climate of Sydney for all months and discover the best travel time
Curious about the climate in other parts of Australia? Check out the weather and climate in places like Gold Coast, Melbourne, Cairns, or have a look at other destinations in Australia.
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Daily Temperature in December in Sydney
This chart shows the average daily temperatures, both day and night, for each day in December in Sydney, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in December in Sydney
The chart below shows the average daily precipitation in December for Sydney, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for December, you can expect around 9 days of rain in Sydney.
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.
Temperature in December in Sydney Over the Years
This chart shows the average temperature in December in Sydney, measured in degrees Celsius, over the past years.
Total Precipitation in December in Sydney Over the Years
This chart shows the average precipitation in December in Sydney, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in December for Sydney
Click on a specific day in December for detailed info on the typical weather on that day in Sydney. Check out the historical temperatures and precipitation over the past 10 years on this day.
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.
