Port Lincoln in September
September is right in the heart of spring for Port Lincoln, and the weather has a definite personality this time of year.
Daytime highs average 17.6 degrees, dropping to 11.0 degrees overnight. That's a 7-degree swing between day and night. It's cool but manageable. A jumper handles most of it.
At 17.6 degrees, September sits 2.7 degrees below the annual average of 20.3 degrees.
You're looking at 42mm of rain across 6 days in a typical September. Light enough that it won't ruin your plans.
Sunshine-wise, September delivers around 15.6 MJ/m2 of daily solar radiation. UV sits in the very high category. You'll want SPF 50+ and a decent hat.
At 5.7/10 on the Comfort Score, September is middle of the road.
For your suitcase: a decent jumper or fleece, and serious sun protection.
The full data breakdown is below. You can also see how other Australian cities compare in September.
September at a Glance
Temperature Range
Daily temperature range in September. The bar shows the typical spread between overnight lows and afternoon highs.
What to Pack
- A jumper or light cardigan for flexibility
- A light rain jacket just in case
- Sunscreen (SPF 30+) and sunglasses for UV protection
Coming From Overseas?
How September in Port Lincoln stacks up against major cities around the world.
About 2 degrees cooler and considerably drier.
About 8 degrees cooler and considerably drier.
About 9 degrees cooler and considerably drier.
How September Compares
Port Lincoln's monthly climate at a glance. September is highlighted.
| Month | Max | Min | Rain | Comfort |
|---|---|---|---|---|
| Jan | 24.0 | 15.9 | 54mm | 10.0 |
| Feb | 25.1 | 16.5 | 1mm | 10.0 |
| Mar | 24.8 | 16.7 | 4mm | 10.0 |
| Apr | 19.1 | 12.4 | 12mm | 6.8 |
| May | 18.4 | 11.3 | 8mm | 6.3 |
| Jun | 15.5 | 10.2 | 52mm | 3.0 |
| Jul | 14.9 | 9.6 | 42mm | 2.8 |
| Aug | 17.7 | 10.6 | 39mm | 5.3 |
| Sep | 17.6 | 11.0 | 42mm | 5.7 |
| Oct | 20.5 | 12.9 | 22mm | 8.6 |
| Nov | 22.3 | 14.1 | 34mm | 9.7 |
| Dec | 24.2 | 15.4 | 24mm | 10.0 |