Sydney weather

Our guide to the weather in Sydney during January

27

Average high

6

UV Index

123mm

Monthly rainfall

24

Sea temperature

We've looked at the most up-to-date weather data for Sydney, covering the last 12 years up to 2024, plus we've asked our team of travel bloggers for their first-hand experiences in order to answer the most frequently asked questions about Sydney weather in January.

How warm is it in Sydney during January?

January is typically the hottest month in Sydney. Remember that in January it's summer in the souther hemisphere! The temperature hits about 27℃ during the day, falling away to a balmy 20℃ at night. Of course, the high humidity will make it feel even hotter. The UV index will be high at this time of year, so protection against skin and eye damage is needed. Try to limit exposure between 10am and 4pm. Apply broad spectrum SPF 30+ sunscreen every few hours, even if it's cloudy, or more frequently after sweating or swimming, and wear UV-blocking sunglasses too, and bear in mind that bright surfaces, such as sand and water increase UV exposure.

Does it rain in Sydney during January?

On average, there will be 4 rainy days during the month, amounting to 122.6mm in total. That's a significant amount of rain. For comparison, the wettest months in the UK typically sees between 80mm and 100mm, depending on where you are. Due to the high temperature and humidity, you might expect lots of thunderstorms, however they're actually fairly infrequent at this time of year. On average, January will see just 2 days that produce a storm.

Is it windy in Sydney during January?

You're unlikely to experience any strong winds. Expect a gentle breeze that increases to moderate at times during January. The high humidity and warm temperature will make the breeze feel warm, so any cooling effect will be limted.

How warm is the sea in Sydney during January?

The water temperature around Sydney reaches a pleasant 24℃ during January. While generally considered warm, some people might find it a little on the cool side on entering the water.

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Weather in Sydney

Our month-by-month guide to the weather and climate in Sydney

26.7

Sydney weather in

January
25.8

Sydney weather in

February
24.8

Sydney weather in

March
22.7

Sydney weather in

April
20.0

Sydney weather in

May
17.1

Sydney weather in

June
16.9

Sydney weather in

July
18.1

Sydney weather in

August
20.5

Sydney weather in

September
22.1

Sydney weather in

October
23.6

Sydney weather in

November
25.1

Sydney weather in

December