Adelaide 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: October – April
What is the weather like in Adelaide in January?
In January, Adelaide is hot: daytime highs average 28 °C, and nights cool down to about 17 °C. The sea averages 21.7 °C – refreshing for a swim. With around 11 hours of sunshine a day, there is plenty of sun. Rain is rare: about 3 days bring 19 mm in total. On about 12 days the thermometer climbs to 30 °C or more. All in all, January is an excellent month for a holiday in Adelaide.
January compared
How the weather changes from December to February. Tap a month to open it.
| DecemberDec | JanuaryJan | FebruaryFeb | |
|---|---|---|---|
| Score | 100 | 91 | 94 |
| Day | 26° | 28° | 28° |
| Night | 15° | 17° | 17° |
| Sea | 20° | 22° | 22° |
| Sun | 10 h | 11 h | 10 h |
| Rain days | 4 | 3 | 2 |
More details for January
- Daylight
- 14 h 15 min06:17 – 20:32
- UV index
- 10 · very highclear sky, noon (estimate)All months
- Muggy days
- 1 daydew point 18 °C or moreAll months
- Wind
- 24 km/haverage daily peakAll months
- Cloud cover
- 34 %on averageAll months
- Hot days
- 12 days30 °C or moreAll months
- Time zone
- UTC+10:30Australia/Adelaide
How the score comes together
- Temperatureweight 50 %83 %
- Sunshineweight 20 %100 %
- Few rainy daysweight 30 %100 %
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
- Water bottle – drink plenty
Adelaide in January: quick answers
Is Adelaide hot in January?
Yes. In January, Adelaide is hot: daytime highs average 28 °C and nights stay around 17 °C. On about 12 days the thermometer climbs to 30 °C or more.
Can you swim in Adelaide in January?
Yes. In January the sea averages 21.7 °C – refreshing for a swim.
Does it rain much in Adelaide in January?
Rain is rare: about 3 days bring 19 mm in total.
Adelaide month by month
The whole year in AdelaideAll destinations: AustraliaWhere to go in JanuarySea temperature in January
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences