Treasure Island, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 67 °F (low) to 79.2 °F (high). Annual precipitation averages 55.3 Inches. Treasure Island is located in USDA Plant Hardiness Zone 10b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 53.3 °F | 67.7 °F | 3.4 in. |
| February | 56.1 °F | 69.5 °F | 2.61 in. |
| March | 60.4 °F | 73.1 °F | 3.47 in. |
| April | 66.0 °F | 78.1 °F | 2.66 in. |
| May | 71.7 °F | 83.4 °F | 2.88 in. |
| June | 76.1 °F | 86.8 °F | 7.9 in. |
| July | 77.2 °F | 88.0 °F | 8.11 in. |
| August | 77.5 °F | 88.5 °F | 9.01 in. |
| September | 75.7 °F | 87.2 °F | 7.58 in. |
| October | 70.6 °F | 82.4 °F | 2.94 in. |
| November | 62.4 °F | 75.0 °F | 1.97 in. |
| December | 56.7 °F | 70.3 °F | 2.76 in. |
| Annual | 67 °F | 79.2 °F | 55.29 in. |
| Average First Frost Date | No Frost |
| Average Last Frost Date | |
| Average Days With Frost | Frost Free |
| Plant Hardiness Zone | Zone 10b : 35°F to 30°F |
| Plant Hardiness Zone - 2012 | Zone 10a : 30°F to 25°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |