Sydney weather in January
Temperature, sea and sunshine in January: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in January
Excellent
Best time to visit: April – May, July – February
What is the weather like in Sydney in January?
In January, Sydney is warm: daytime highs average 25 °C, and nights cool down to about 20 °C. The sea averages 23.0 °C – pleasant for swimming. The sun shines for around 8 hours a day. Rain is frequent, with about 10 rainy days and 70 mm in total. All in all, January is an excellent month for a holiday in Sydney.
January compared
How the weather changes from December to February. Tap a month to open it.
| DecemberDec | JanuaryJan | FebruaryFeb | |
|---|---|---|---|
| Score | 87 | 83 | 79 |
| Day | 24° | 25° | 25° |
| Night | 18° | 20° | 20° |
| Sea | 22° | 23° | 24° |
| Sun | 8 h | 8 h | 7 h |
| Rain days | 9 | 10 | 11 |
More details for January
- Daylight
- 14 h 10 min05:59 – 20:09
- UV index
- 11 · extremeclear sky, noon (estimate)All months
- Muggy days
- 15 daysdew point 18 °C or more
- Wind
- 19 km/haverage daily peak
- Cloud cover
- 57 %on average
- Hot days
- 2 days30 °C or more
- Time zone
- UTC+11Australia/Sydney
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %78 %
- Few rainy daysweight 30 %58 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in January
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Rain jacket or umbrella
Sydney in January: quick answers
Is Sydney hot in January?
Warm rather than hot: in January, daytime highs in Sydney average 25 °C and nights cool to about 20 °C. On about 2 days the thermometer climbs to 30 °C or more.
Can you swim in Sydney in January?
Yes. In January the sea averages 23.0 °C – pleasant for swimming.
Does it rain much in Sydney in January?
Rain is frequent, with about 10 rainy days and 70 mm in total.
Sydney month by month
The whole year in SydneyAll destinations: AustraliaWhere to go in January
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, GeoNames (CC BY 4.0)