January weather forecast
Sydney, Australia

The landmarks of the city of Sydney, Australia
The landmarks of the city of Sydney, Australia

Weather in January

January, like December, in Sydney, Australia, is another warm summer month, with an average temperature fluctuating between 18.7°C (65.7°F) and 25.9°C (78.6°F).

Temperature

January is the warmest month, with an average high-temperature of 25.9°C (78.6°F) and an average low-temperature of 18.7°C (65.7°F).

Humidity

The average relative humidity in January in Sydney is 62%.

Rainfall

In Sydney, during January, the rain falls for 12.2 days and regularly aggregates up to 102mm (4.02") of precipitation. In Sydney, Australia, during the entire year, the rain falls for 143.4 days and collects up to 1212mm (47.72") of precipitation.

Sea temperature

In Sydney, the average seawater temperature in January is 23.3°C (73.9°F).
Note: For individuals prone to feeling cold, swimming in 23°C (73.4°F) is still regarded as intolerable. A wetsuit is not a necessity, but sunshine, wind, and air temperature are essential factors for relishing swimming at 23.3°C (73.9°F).

Daylight

The average length of the day in January is 14h and 7min.
On the first day of the month, sunrise is at 5:47 am and sunset at 8:09 pm. On the last day of January, in Sydney, sunrise is at 6:15 am and sunset at 8:01 pm AEDT.

Sunshine

In Sydney, Australia, the average sunshine in January is 7.6h.

UV index

The months with the highest UV index in Sydney are January and December, with an average maximum UV index of 12. A UV Index reading of 11, and higher, represents an ultimate health vulnerability from unsafe exposure to UV radiation for the average person.
Note: In January, the average maximum UV index of 12 translate into the following recommendations:
Take all necessary precautions, as unprotected skin can burn in minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Prolonged stay under the direct sun should be avoided as much as possible, especially if a person burns easily. Sunscreen with a minimum 30 sun protection factor should always be used. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.
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FAQ

What is the warmest month in Sydney?

The warmest month is January, with an average high-temperature of 25.9°C (78.6°F) and an average low-temperature of 18.7°C (65.7°F).

What is the temperature in January in Sydney?

The average high-temperature, in January, is 25.9°C (78.6°F), while the average low-temperature is 18.7°C (65.7°F).

What is the average humidity in January in Sydney?

In Sydney, the average relative humidity in January is 62%.

How much does it rain in Sydney in January?

In January, in Sydney, the rain falls for 12.2 days. Throughout January, 102mm (4.02") of precipitation is accumulated.

What is the sea temperature in January in Sydney?

In January, the average sea temperature is 23.3°C (73.9°F). A person's cold intolerance, with sunshine, wind, and air temperature, are essential factors for enjoying swimming in 23.3°C (73.9°F) water.

What is the average length of the day in January in Sydney?

The average day length in January in Sydney, Australia, is 14h and 7min.

When are sunrise and sunset in January in Sydney?

On the first day of January in Sydney, Australia, sunrise is at 5:47 am and sunset at 8:09 pm. On the last day of the month, sunrise is at 6:15 am and sunset at 8:01 pm AEDT.

How long on average sun shines in January in Sydney?

In Sydney, Australia, the average sunshine duration in January is 7.6h.

What are the months with the highest UV index in Sydney?

January and December, with an average maximum UV index of 12, are months with the highest UV index in Sydney, Australia.

What is the UV index reading in January in Sydney?

The average daily maximum UV index in January is 12. A UV Index estimate of 11, and higher, represents an ultimate hazard to health from exposure to the Sun's UV radiation.

Average temperature in January
Sydney, Australia

Average temperature in January - Sydney, Australia
  • Average high temperature in January: 25.9°C

The warmest month (with the highest average high temperature) is January (25.9°C).
The month with the lowest average high temperature is July (16.3°C).

  • Average low temperature in January: 18.7°C

The month with the highest average low temperature is February (18.8°C).
The coldest month (with the lowest average low temperature) is July (8.1°C).

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Average humidity in January
Sydney, Australia

Average humidity in January - Sydney, Australia
  • Average humidity in January: 62%

The month with the highest relative humidity is February (64%).
The month with the lowest relative humidity is August (49%).

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Average rainfall in January
Sydney, Australia

Average rainfall in January - Sydney, Australia
  • Average rainfall in January: 101.6mm

The wettest month (with the highest rainfall) is June (131.9mm).
The driest month (with the least rainfall) is September (68.3mm).

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Average rainfall days in January
Sydney, Australia

Average rainfall days in January - Sydney, Australia
  • Average rainfall days in January: 12.2 days

The month with the highest number of rainy days is March (13.6 days).
The month with the least rainy days is August (10.4 days).

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Average sea temperature in January
Sydney, Australia

Average sea temperature in January - Sydney, Australia
  • Average sea temperature in January: 23.3°C

The best month for swimming (with the highest average sea temperature) is February (23.7°C).
The coldest month (with the lowest average sea temperature) is September (18.6°C).

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Average daylight in January /
Average sunshine in January
Sydney, Australia

Average daylight in January / Average sunshine in January - Sydney, Australia
  • Average daylight in January: 14h and 7min

The month with the longest days is December (Average daylight: 14h and 22min).
The month with the shortest days is June (Average daylight: 9h and 56min).

  • Average sunshine in January: 7h and 36min

The months with the most sunshine are August, September, October and December (Average sunshine: 7h and 54min).
The month with the least sunshine is June (Average sunshine: 5h and 54min).

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Average UV index in January
Sydney, Australia

Average UV index in January - Sydney, Australia
  • Average UV index in January: 12

The months with the highest UV index are January and December (UV index 12).
The month with the lowest UV index is June (UV index 2).

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