January weather forecast
Sydney, Australia

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

Weather in January

The year in Sydney commences under the auspices of high temperatures and a considerable amount of daylight. Clear skies are plentiful, providing ample hours for outdoor activities. However, Sydney's high temperature of 25.9°C (78.6°F) in January, balanced with a humidity level of 62%, does require residents and visitors alike to stay hydrated during their ventures. Beach-goers will also find the sea temperature welcoming at 23.3°C (73.9°F). The long, vibrant, sun-soaked days make January a particularly enjoyed period in the Sydney calendar.

Temperature

January, with an average high of 25.9°C (78.6°F) and a low of 18.7°C (65.7°F), signifies the warmest month of the year in Sydney.

Humidity

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

Rainfall

In Sydney, in January, during 12.2 rainfall days, 102mm (4.02") of precipitation is typically accumulated. In Sydney, during the entire year, the rain falls for 143.4 days and collects up to 1212mm (47.72") of precipitation.

Sea temperature

In January, the average sea temperature in Sydney is 23.3°C (73.9°F).
Note: If cold is not your friend, swimming at 23.3°C (73.9°F) might be daunting. But the right mix of sunshine, wind, and external temperature can make a difference. Although wetsuits are not essential, they can enhance the swimming experience.

Daylight

The average length of the day in January is 14h and 7min.
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 6:14 am and sunset at 8:01 pm AEDT.

Sunshine

In January, the average sunshine is 7.6h.

UV index

The months with the highest UV index are January and December, with an average maximum UV index of 12. A UV Index estimate of 11, and higher, represents an extreme health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: A maximum high daily UV index of 12 during January translates into the following directions:
Execute all vital precautions. Preventing sun damage is of utmost importance. Avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is most intense, and remember that not all shade structures provide full protection. Stay sun-safe with clothing that is both closely woven and worn loosely. Stay sun-safe by applying a sunscreen of at least 30 SPF. It's crucial for preventing sunburn and protecting the immune system. Warning! Reflective surfaces like sand and water amplify the Sun's UV radiation.

Frequently asked questions

What is the warmest month in Sydney?

January temperatures in Sydney tend to peak at an average high of 25.9°C (78.6°F) and dip to a low of 18.7°C (65.7°F).

What are the temperatures in Sydney in January?

An average high-temperature, in January, in Sydney, is 25.9°C (78.6°F) and 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 Sydney, the average seawater temperature in January is 23.3°C (73.9°F). Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 23.3°C (73.9°F) water may be enjoyable.

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

In Sydney, the average day length in January is 14h and 7min.

When are sunrise and sunset in January in Sydney?

In January, on the first day of the month, sunrise is at 5:47 am and sunset at 8:09 pm. On the last day of the month, sunrise is at 6:14 am and sunset at 8:01 pm AEDT.

How long on average sun shines in January in Sydney?

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

What is the month with the highest UV index in Sydney?

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

What is the UV index reading in January in Sydney?

In January, the average daily maximum UV index is 12. A UV Index of 11, and more, symbolizes an extreme health threat from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average UV index

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).

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%).

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).

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).

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).

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 1min

The month with the longest days is December (Average daylight: 14h and 24min).
The month with the shortest days is June (Average daylight: 9h and 54min).

  • Average sunshine in January: 7h and 4min

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).

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).

Sydney, Australia

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