Verdict: Excellent month
Cairns Weather in September
September runs warm in Cairns, with daily highs around 27°C (81°F) and nights near 20°C (68°F). Expect showers on roughly 11 days of the month — rarely trip-ruining, worth planning around. Overall, September is one of the best months of the year to be in Cairns.
Average high
27°C / 81°F
Average low
20°C / 68°F
Rain days
~11
Precipitation
57 mm
What to pack for Cairns in September
- Summer clothes, plus one light layer for air-con and evenings
- High-SPF sunscreen, sunglasses, and a refillable water bottle
- A packable rain shell or compact umbrella earns its space
- Comfortable walking shoes — every guide on this site assumes you'll use them
September against the rest of the year
Warmest in Cairns: Jan (31°C / 88°F) · Coolest: Jul (24°C / 75°F) · Wettest: Jan (~24 rain days)
31°
24°
Jan
31°
24°
Feb
30°
24°
Mar
29°
23°
Apr
26°
20°
May
25°
19°
Jun
24°
18°
Jul
25°
18°
Aug
27°
20°
Sep
29°
21°
Oct
30°
22°
Nov
31°
24°
Dec
Daily highs / lows in °C · bars show rain days per month · ERA5 climate normals (2020–2024)