The temperature in Cairns averages out to 24-28C (75-82F) for most of the year, pushing up to 30-35C (86-95F) averages in summer. Summer also brings a jump in humidity and a higher likelihood of rain. When it does rain it is usually early in the morning, late in the afternoon or during the night.
| Month | Temp (°C) | Rainfall (mm) | Humidity (%) | Sunshine (hours) |
| Jan | 23 - 31 | 40 | ||
| Feb | 23 - 31 | 41 | ||
| Mar | 22 - 30 | 43 | ||
| Apr | 21 - 28 | 19 | ||
| May | 20 - 27 | 9 | ||
| Jun | 17 - 25 | 4 | ||
| Jul | 17 - 25 | 2 | ||
| Aug | 17 - 26 | 2 | ||
| Sep | 18 - 27 | 3 | ||
| Oct | 20 - 29 | 3 | ||
| Nov | 22 - 30 | 9 | ||
| Dec | 23 - 31 | 17 |