Perth in January
January is right in the heart of summer for Perth, and the weather has a definite personality this time of year.
The average daily maximum is 30.2 degrees with overnight lows of 19.1 degrees. Comfortable during the day, with evenings that invite a light layer.
January is 5.5 degrees warmer than the yearly average here.
Rainfall in January averages 1mm over about 0 days. That means roughly a 0% chance of rain on any given day, so you can leave the umbrella at the hotel.
Sunshine-wise, January delivers around 30.5 MJ/m2 of daily solar radiation. UV sits in the extreme category. Sunscreen, hat, and sunnies are all essential. You can burn in under 10 minutes.
January scores a respectable 7.2/10 for overall comfort.
For your suitcase: loose cotton or linen gear, and serious sun protection.
Being on the coast is a blessing in January. The afternoon sea breeze is nature's air conditioning.
Scroll down for the detailed climate data, or explore what nearby cities are like in January.
January at a Glance
Temperature Range
Daily temperature range in January. The bar shows the typical spread between overnight lows and afternoon highs.
What to Pack
- Light, breathable clothing and a wide-brimmed hat
- High SPF sunscreen (50+), sunglasses, and UV-protective clothing
Coming From Overseas?
How January in Perth stacks up against major cities around the world.
About 22 degrees warmer and considerably drier.
About 26 degrees warmer and considerably drier.
About 20 degrees warmer and considerably drier.
How January Compares
Perth's monthly climate at a glance. January is highlighted.
| Month | Max | Min | Rain | Comfort |
|---|---|---|---|---|
| Jan | 30.2 | 19.1 | 1mm | 7.2 |
| Feb | 33.2 | 20.5 | 18mm | 4.8 |
| Mar | 29.3 | 17.4 | 4mm | 7.6 |
| Apr | 27.5 | 15.9 | 20mm | 8.2 |
| May | 24.4 | 14.6 | 94mm | 9.0 |
| Jun | 18.7 | 11.2 | 113mm | 4.9 |
| Jul | 18.0 | 10.9 | 154mm | 4.0 |
| Aug | 18.2 | 12.2 | 168mm | 4.1 |
| Sep | 20.6 | 11.1 | 27mm | 8.3 |
| Oct | 22.4 | 13.1 | 43mm | 9.7 |
| Nov | 24.9 | 14.9 | 25mm | 10.0 |
| Dec | 29.5 | 18.9 | 6mm | 7.5 |