Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average sea temperature in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
The shift from November to December includes a minor decrease in the average high-temperature, lightly dropping from a frosty 7.4°C (45.3°F) to an icy 2.5°C (36.5°F). December nights witness a mild cool down to an average low of -1.9°C (28.6°F).Humidity
In Sydney, the average relative humidity in December is 83%.Rainfall
In Sydney, in December, during 12.2 rainfall days, 57mm (2.24") of precipitation is typically accumulated. Throughout the year, there are 148.9 rainfall days, and 651mm (25.63") of precipitation is accumulated.Snowfall
Months with snowfall are January through May, November and December. In Sydney, in December, during 10.8 snowfall days, 53mm (2.09") of snow is typically accumulated. Throughout the year, there are 60.9 snowfall days, and 428mm (16.85") of snow is accumulated.Sea temperature
In Sydney, in December, the average water temperature is 4.3°C (39.7°F).Note: When swimming, this is deemed life-endangering and extremely risky. The painful cold water instigates fast-paced hyperventilation. Wearing a specialized swimsuit is necessary to lessen thermal harm.
Daylight
With an average of 8h and 42min of daylight, December has the shortest days of the year in Sydney.On the first day of the month, sunrise is at 7:23 am and sunset at 4:16 pm. On the last day of December, in Sydney, sunrise is at 7:43 am and sunset at 4:25 pm AST.
Sunshine
The average sunshine in December in Sydney is 3h.UV index
The months with the lowest UV index in Sydney, Canada, are January, March and December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: In December, the maximum UV index of 1 suggests these recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
Frequently asked questions
How cold is it in Sydney in December?
What is the average humidity in December in Sydney?
How much does it rain in Sydney in December?
How many days does it snow in December in Sydney?
What is the sea temperature in December in Sydney?
What is the month with the shortest days in Sydney?
What is the average length of the day in December in Sydney?
When are sunrise and sunset in December in Sydney?
How long on average sun shines in December in Sydney?
When is the lowest UV index in Sydney?
What is the UV index reading in December in Sydney?
Average temperature in December
Sydney, Canada
- Average high temperature in December: 2.5°C
The warmest month (with the highest average high temperature) is August (22.3°C).
The month with the lowest average high temperature is February (-1.5°C).
- Average low temperature in December: -1.9°C
The month with the highest average low temperature is August (15.5°C).
The coldest month (with the lowest average low temperature) is February (-7.3°C).
Average pressure in December
Sydney, Canada
- Average pressure in December: 1012.6mbar
The month with the highest atmospheric pressure is September (1016.3mbar).
The month with the lowest atmospheric pressure is February (1010.6mbar).
Average wind speed in December
Sydney, Canada
- Average wind speed in December: 20.3km/h
The windiest month (with the highest average wind speed) is January (20.6km/h).
The calmest month (with the lowest average wind speed) is July (14km/h).
Average humidity in December
Sydney, Canada
- Average humidity in December: 83%
The month with the highest relative humidity is February (87%).
The months with the lowest relative humidity are May, August and September (81%).
Average rainfall in December
Sydney, Canada
- Average rainfall in December: 57mm
The wettest month (with the highest rainfall) is October (68mm).
The driest month (with the least rainfall) is September (37mm).
Average rainfall days in December
Sydney, Canada
- Average rainfall days in December: 12.2 days
The month with the highest number of rainy days is April (14.4 days).
The month with the least rainy days is February (7.9 days).
Average snowfall in December
Sydney, Canada
- Average snowfall in December: 53mm
The month with the highest snowfall is March (117mm).
The months with the least snowfall are June, July, August, September and October (0mm).
Average snowfall days in December
Sydney, Canada
- Average snowfall days in December: 10.8 days
The month with the highest number of snowfall days is January (14.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in December
Sydney, Canada
- Average sea temperature in December: 4.3°C
The best month for swimming (with the highest average sea temperature) is August (17.8°C).
The coldest month (with the lowest average sea temperature) is March (-0.8°C).
Average daylight in December /
Average sunshine in December
Sydney, Canada
- Average daylight in December: 8h and 4min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in December: 3h and 0min
The month with the most sunshine is August (Average sunshine: 9h and 12min).
The month with the least sunshine is January (Average sunshine: 2h and 54min).
Average sunshine days in December
Sydney, Canada
- Average sunshine days in December: 10.5 days
The month with the most sunshine days is September (14 days).
The month with the least sunshine days is January (9.7 days).
Average UV index in December
Sydney, Canada
- Average UV index in December: 1
The months with the highest UV index are July and August (UV index 5).
The months with the lowest UV index are January, March and December (UV index 1).
Average cloud cover in December
Sydney, Canada
- Average cloud cover in December: 69
The month with the most cloud cover is January (Cloud cover 71).
The month with the least cloud cover is August (Cloud cover 40).
Average visibility in December
Sydney, Canada
- Average visibility in December: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
Sydney, Canada
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