Mackay in September
September in Mackay is peak spring, and the weather reflects it. You're looking at average daily highs of 25.5 degrees.
Daytime highs average 25.5 degrees, dropping to 18.7 degrees overnight. That's a 7-degree swing between day and night. Comfortable during the day, with evenings that invite a light layer.
September's temperature is very close to the annual average for Mackay.
The rain data says 11mm over 3 days. That's barely a sprinkle.
Sunshine-wise, September delivers around 21.1 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.
Our Comfort Score rates September at 10.0/10. That's about as good as it gets.
For your suitcase: t-shirts with a light layer for evenings, 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
- T-shirts and shorts for daytime
- High SPF sunscreen (50+), sunglasses, and UV-protective clothing
Coming From Overseas?
How September in Mackay stacks up against major cities around the world.
About 6 degrees warmer and considerably drier.
About 0 degrees cooler and considerably drier.
About 2 degrees cooler and considerably drier.
How September Compares
Mackay's monthly climate at a glance. September is highlighted.
| Month | Max | Min | Rain | Comfort |
|---|---|---|---|---|
| Jan | 30.2 | 25.4 | 172mm | 4.4 |
| Feb | 29.3 | 24.4 | 260mm | 4.6 |
| Mar | 28.1 | 24.3 | 142mm | 5.4 |
| Apr | 26.7 | 21.7 | 117mm | 6.9 |
| May | 23.9 | 19.7 | 70mm | 8.5 |
| Jun | 22.7 | 14.0 | 53mm | 9.1 |
| Jul | 21.6 | 14.6 | 20mm | 8.6 |
| Aug | 23.2 | 16.5 | 35mm | 9.4 |
| Sep | 25.5 | 18.7 | 11mm | 10.0 |
| Oct | 27.1 | 21.0 | 28mm | 8.8 |
| Nov | 28.6 | 23.7 | 136mm | 6.8 |
| Dec | 29.0 | 24.1 | 230mm | 5.1 |