Port Arthur in January
January is right in the heart of summer for Port Arthur, and the weather has a definite personality this time of year.
Daytime highs average 20.7 degrees, dropping to 13.0 degrees overnight. That's a 8-degree swing between day and night. That's solidly pleasant territory. Great for being outdoors.
At 20.7 degrees, January runs 4.2 degrees above Port Arthur's annual average of 16.5 degrees.
The rain data says 99mm over 14 days. Moderate, often falling in a few good dumps rather than constant drizzle.
Solar exposure averages 22.3 MJ/m2 per day in January, with UV levels in the extreme range. Sunscreen, hat, and sunnies are all essential. You can burn in under 10 minutes.
The Comfort Score for January comes in at 7.8/10, solidly pleasant.
For your suitcase: layers you can peel on and off, a rain jacket or compact umbrella, and serious sun protection.
Check the data table below for the full picture, or compare Port Arthur in January with another destination.
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
- Layered clothing for mild to cool conditions
- A waterproof jacket or compact umbrella
- High SPF sunscreen (50+), sunglasses, and UV-protective clothing
Coming From Overseas?
How January in Port Arthur stacks up against major cities around the world.
About 13 degrees warmer and considerably wetter.
About 17 degrees warmer and considerably wetter.
About 11 degrees warmer and considerably wetter.
How January Compares
Port Arthur's monthly climate at a glance. January is highlighted.
| Month | Max | Min | Rain | Comfort |
|---|---|---|---|---|
| Jan | 20.7 | 13.0 | 99mm | 7.8 |
| Feb | 21.5 | 13.2 | 23mm | 9.0 |
| Mar | 19.6 | 12.1 | 29mm | 6.9 |
| Apr | 16.4 | 10.4 | 77mm | 3.8 |
| May | 14.1 | 9.2 | 36mm | 1.9 |
| Jun | 11.7 | 7.7 | 37mm | 1.0 |
| Jul | 11.7 | 6.7 | 72mm | 1.0 |
| Aug | 14.1 | 8.1 | 89mm | 1.5 |
| Sep | 14.1 | 7.4 | 54mm | 2.6 |
| Oct | 15.8 | 8.4 | 73mm | 4.1 |
| Nov | 18.2 | 10.4 | 64mm | 6.3 |
| Dec | 20.1 | 11.9 | 122mm | 7.1 |