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Cairns Weather by Month
Average temperatures, rainfall and humidity for Cairns, Australia, month by month, built from OpenWeather’s historical records. Use it to see what a typical Cairns month looks like before you travel — then check the live Cairns forecast for the days ahead.
Warmest month
December
32°C average high
Coolest month
August
17°C average low
Wettest month
January
153 mm of rain
Driest month
August
26 mm of rain
Average temperature and rainfall in Cairns by month
Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.
| Month | Avg high | Avg low | Record low / high | Rainfall | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 31°C | 25°C | 21°C / 38°C | 153 mm | 82% | 13 km/h |
| February | 31°C | 24°C | 20°C / 39°C | 107 mm | 82% | 13 km/h |
| March | 31°C | 24°C | 19°C / 37°C | 135 mm | 81% | 14 km/h |
| April | 29°C | 23°C | 16°C / 36°C | 80 mm | 79% | 17 km/h |
| May | 28°C | 21°C | 11°C / 36°C | 65 mm | 79% | 18 km/h |
| June | 26°C | 19°C | 11°C / 33°C | 55 mm | 76% | 17 km/h |
| July | 26°C | 18°C | 8°C / 30°C | 40 mm | 76% | 16 km/h |
| August | 27°C | 17°C | 9°C / 32°C | 26 mm | 74% | 16 km/h |
| September | 28°C | 19°C | 9°C / 33°C | 36 mm | 73% | 16 km/h |
| October | 30°C | 21°C | 9°C / 35°C | 38 mm | 74% | 15 km/h |
| November | 31°C | 23°C | 17°C / 41°C | 43 mm | 73% | 14 km/h |
| December | 32°C | 24°C | 18°C / 38°C | 99 mm | 76% | 14 km/h |
Best time to visit Cairns
The most comfortable time to visit Cairns is generally June to August, balancing mild daytime temperatures against the driest stretch of the year. Temperatures stay fairly even all year and rain concentrates around January, totalling about 878 mm a year.
Travellers who prefer heat should aim for December, when highs average 32°C. January is the month to avoid if rain would spoil your plans — it averages 153 mm, roughly 6× the rainfall of the driest month (August).
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Cairns forecast for what is happening now.