Part of a tropical savannah climate, Gladstone satisfies this classifications requirements of average temperatures in excess of 18 degrees year round and a dominant dry season with less than 60mm of rainfall with its average maximum temperatures of 27 degrees. Gladstone generally experiences limited rainfall with an average of 880mm annually, most of which falls outside the dry season. Australia's most southern region to be classified as a tropical savannah climate, Gladstone experiences a tropical wet season but overall has a dry climate.
| Averages | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rainfall (mm) | 143 | 143 | 82 | 46 | 60 | 39 | 35 | 32 | 26 | 62 | 74 | 128 |
| Temp (°C) | 26 | 26 | 26 | 23 | 21 | 18 | 17 | 18 | 21 | 23 | 25 | 26 |
| Min Temp (°C) | 22 | 22 | 21 | 19 | 17 | 14 | 13 | 14 | 16 | 18 | 20 | 21 |
| Max Temp (°C) | 31 | 30 | 30 | 28 | 25 | 23 | 22 | 24 | 26 | 26 | 29 | 30 |
