Karratha in September
September in Karratha is peak spring, and the weather reflects it. You're looking at average daily highs of 32.7 degrees.
The average daily maximum is 32.7 degrees with overnight lows of 22.1 degrees. Warm days and warm nights. It doesn't cool down much, even after sunset.
At 32.7 degrees, September sits 1.3 degrees below the annual average of 34.0 degrees.
The rain data says 33mm over 3 days. Nothing dramatic.
Solar exposure averages 22.2 MJ/m2 per day in September, with UV levels in the extreme range. Sunscreen, hat, and sunnies are all essential. You can burn in under 10 minutes.
At 5.0/10 on the Comfort Score, September is middle of the road.
Packing tip: bring loose cotton or linen gear, and SPF 50+ sunscreen and a hat.
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
- Cotton or linen fabrics to stay cool
- Strong sun protection including a hat and SPF 50+
Coming From Overseas?
How September in Karratha stacks up against major cities around the world.
About 13 degrees warmer and considerably drier.
About 7 degrees warmer and considerably drier.
About 6 degrees warmer and considerably drier.
How September Compares
Karratha's monthly climate at a glance. September is highlighted.
| Month | Max | Min | Rain | Comfort |
|---|---|---|---|---|
| Jan | 37.3 | 26.6 | 0mm | 1.0 |
| Feb | 38.8 | 27.4 | 6mm | 1.0 |
| Mar | 36.1 | 26.8 | 20mm | 2.1 |
| Apr | 34.0 | 23.1 | 61mm | 3.7 |
| May | 31.5 | 20.1 | 7mm | 5.6 |
| Jun | 27.1 | 16.7 | 28mm | 8.3 |
| Jul | 27.6 | 15.7 | 0mm | 8.4 |
| Aug | 29.8 | 17.4 | 13mm | 6.9 |
| Sep | 32.7 | 22.1 | 33mm | 5.0 |
| Oct | 36.6 | 23.8 | 0mm | 1.9 |
| Nov | 38.2 | 26.9 | 3mm | 1.0 |
| Dec | 38.7 | 27.8 | 10mm | 1.0 |