Sewall's Point, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 67.9 °F (low) to 82.6 °F (high). Annual precipitation averages 61.6 Inches. Sewall's Point is located in USDA Plant Hardiness Zone 10b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 56.7 °F | 73.5 °F | 3.06 in. |
| February | 58.8 °F | 76.0 °F | 2.76 in. |
| March | 62.0 °F | 77.8 °F | 3.38 in. |
| April | 66.7 °F | 81.5 °F | 3.41 in. |
| May | 71.1 °F | 85.0 °F | 5.59 in. |
| June | 74.7 °F | 88.3 °F | 7.36 in. |
| July | 76.0 °F | 89.9 °F | 6.68 in. |
| August | 76.2 °F | 90.0 °F | 8.83 in. |
| September | 75.6 °F | 88.1 °F | 7.92 in. |
| October | 72.0 °F | 84.7 °F | 5.81 in. |
| November | 65.2 °F | 79.7 °F | 3.79 in. |
| December | 60.2 °F | 76.2 °F | 2.97 in. |
| Annual | 67.9 °F | 82.6 °F | 61.56 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 | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |