AustraliaAverage weather for Sydney 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.
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. A few showers might pop up early in the month, but overall, it’ll stay mostly sunny and dry.
With the temperature difference between day and night, it’s smart to wear layers.
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.
Since it cools down at night, it’s a good idea to wear layers.
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.
Because temperatures drop in the evening, wearing layers is recommended.
Water temperature
The water temperature at Sydney is 25°C this month. Lovely temperature for a swim.
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.
Sydney in December |
New York | ||
|---|---|---|---|
 Average temperature |
27°C | 9°C | |
 Max. temperature |
29°C | 12°C | |
| Min. temperature |
25°C | -5°C | |
 Total precipitation |
137 mm | 133 mm | |
| Rainy days |
9 days | 17 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?
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.
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.
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.
Daily Temperature in December in Sydney
This chart shows the average daily high and low temperatures in December for Sydney, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in December in Sydney
The chart below shows the average daily precipitation in December for Sydney, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed 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 it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for December, you can expect about 9 days of precipitation 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 few years.
Total precipitation in December in Sydney over the years
This chart shows the average precipitation in December in Sydney, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
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.
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.
