Harbor Bluffs, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 66.6 °F (low) to 80 °F (high). Annual precipitation averages 56.3 Inches. Harbor Bluffs is located in USDA Plant Hardiness Zone 10b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 52.8 °F | 68.9 °F | 3.02 in. |
| February | 55.7 °F | 70.9 °F | 2.66 in. |
| March | 60.0 °F | 74.7 °F | 3.19 in. |
| April | 65.6 °F | 79.1 °F | 2.85 in. |
| May | 71.4 °F | 83.9 °F | 2.89 in. |
| June | 75.8 °F | 87.3 °F | 7.74 in. |
| July | 77.0 °F | 88.2 °F | 9.52 in. |
| August | 77.2 °F | 88.7 °F | 9.46 in. |
| September | 75.3 °F | 87.5 °F | 7.28 in. |
| October | 70.1 °F | 82.9 °F | 2.73 in. |
| November | 61.7 °F | 76.4 °F | 2.05 in. |
| December | 56.1 °F | 71.5 °F | 2.86 in. |
| Annual | 66.6 °F | 80 °F | 56.25 in. |
| Average First Frost Date | Frost Rare |
| 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 |