Charlotte Harbor, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 64.6 °F (low) to 84.4 °F (high). Annual precipitation averages 54.8 Inches. Charlotte Harbor is located in USDA Plant Hardiness Zone 10a.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 52.1 °F | 74.3 °F | 2.28 in. |
| February | 54.6 °F | 76.9 °F | 1.94 in. |
| March | 57.6 °F | 80.1 °F | 2.75 in. |
| April | 62.8 °F | 84.6 °F | 2.4 in. |
| May | 67.8 °F | 88.7 °F | 3.62 in. |
| June | 73.1 °F | 90.6 °F | 9.7 in. |
| July | 74.4 °F | 91.3 °F | 8.3 in. |
| August | 74.7 °F | 91.6 °F | 9.16 in. |
| September | 73.5 °F | 90.3 °F | 7.68 in. |
| October | 68.7 °F | 86.7 °F | 3.34 in. |
| November | 60.2 °F | 80.8 °F | 1.66 in. |
| December | 55.6 °F | 76.6 °F | 1.99 in. |
| Annual | 64.6 °F | 84.4 °F | 54.82 in. |
| Average First Frost Date | No Frost |
| Average Last Frost Date | |
| Average Days With Frost | Frost Free |
| Plant Hardiness Zone | Zone 10a : 30°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 10a : 30°F to 25°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |