Monkey Mia has a long and very hot summer (December to March) where little rain falls and the temperature is usually over 40°C (104°F); January and February are typically the hottest months. Winter brings marginally cooler weather, and rain, where temperatures are around 30°C (86°F). Average rainfall is around 600mm per year.
| Month | Temp (°C) | Rainfall (mm) | Humidity (%) | Sunshine (hours) |
| Jan | 21 - 45 | 7.6 | ||
| Feb | 22 - 47 | 14.7 | ||
| Mar | 21 - 42 | 14.1 | ||
| Apr | 19 - 39 | 14.4 | ||
| May | 16 - 36 | 39.5 | ||
| Jun | 14 - 29 | 55.7 | ||
| Jul | 12 - 29 | 41.2 | ||
| Aug | 13 - 30 | 22.4 | ||
| Sep | 14 - 36 | 7.9 | ||
| Oct | 16 - 39 | 6.2 | ||
| Nov | 18 - 42 | 3.2 | ||
| Dec | 20 - 42 | 1.3 |