Perth 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
Good
Best time to visit: March – May, September – December
What is the weather like in Perth in January?
In January, Perth is hot: daytime highs average 31 °C, and nights cool down to about 19 °C. The sea averages 22.0 °C – refreshing for a swim. With around 12 hours of sunshine a day, there is plenty of sun. It hardly ever rains. On about 19 days the thermometer climbs to 30 °C or more. It is often windy, with gusts of around 29 km/h. All in all, January is a good month for a holiday in Perth.
January compared
How the weather changes from December to February. Tap a month to open it.
| DecemberDec | JanuaryJan | FebruaryFeb | |
|---|---|---|---|
| Score | 86 | 73 | 72 |
| Day | 29° | 31° | 32° |
| Night | 17° | 19° | 19° |
| Sea | 21° | 22° | 23° |
| Sun | 12 h | 12 h | 11 h |
| Rain days | 2 | 2 | 1 |
More details for January
- Daylight
- 14 h 1 min05:25 – 19:26
- UV index
- 11 · extremeclear sky, noon (estimate)
- Muggy days
- 2 daysdew point 18 °C or more
- Wind
- 29 km/haverage daily peak
- Cloud cover
- 22 %on average
- Hot days
- 19 days30 °C or more
- Time zone
- UTC+8Australia/Perth
How the score comes together
- Temperatureweight 50 %46 %
- 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
- Windproof jacket
Perth in January: quick answers
Is Perth hot in January?
Yes. In January, Perth is hot: daytime highs average 31 °C and nights stay around 19 °C. On about 19 days the thermometer climbs to 30 °C or more.
Can you swim in Perth in January?
Yes. In January the sea averages 22.0 °C – refreshing for a swim.
Does it rain much in Perth in January?
It hardly ever rains.
Perth month by month
The whole year in PerthAll destinations: Australia
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)