Cairns Weather in September
What's the weather like in Cairns (Queensland) in September 2025?
The climate in Cairns during September can be summarized as warm and reasonably dry.
September is in the spring in Cairns and is typically the 4th coldest month of the year. Daytime maximum temperatures average around a comfortable 27°C (81°F), whilst at night 18°C (65°F) is normal.
| Daytime temperature | 27.4°C 81.2°F |
|---|---|
| Nightly temperature | 18.1°C 64.5°F |
| Average temperature | 22.7°C 72.9°F |
| Daily sunshine | 8.6 hrs |
| Avg rainfall | 39 mm 1.5 ins |
| Rainy days | 3 days |
| Sea temperature | 24.9°C 76.8°F |
| Humidity | 60% |
| Windspeed | 18.4kph 11 mph |
On average September is the 2nd driest month of the year in Cairns with around 39mm 1.5 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 3 days, although this may vary considerably.
On the flip side this corresponds to an average of 8.6 hours of sunshine per day.
September temperatures in Cairns
September rainfall
September hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Cairns in September 2025.
Other monthly averages
Best places to visit in September
Cairns weather stats
| Hottest month: | January | 30.8°C 87.4°F |
|---|---|---|
| Driest month: | August | 38mm 1.5ins |
| Sunniest month: | October | 9hrs |
| Coldest month: | July | 24.6°C 76.3°F |
| Wettest month: | March | 442mm 17.4ins |
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