Lake Harbor, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 17.8 °C (low) to 28.9 °C (high). Annual precipitation averages 1230.6 Millimeters. Lake Harbor is located in USDA Plant Hardiness Zone 10a.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 11.3 °C | 23.5 °C | 49.78 mm |
| February | 12.6 °C | 25.2 °C | 46.48 mm |
| March | 14.1 °C | 26.8 °C | 67.82 mm |
| April | 16.7 °C | 29 °C | 62.74 mm |
| May | 19.2 °C | 30.9 °C | 101.6 mm |
| June | 22 °C | 32.3 °C | 188.47 mm |
| July | 22.7 °C | 33 °C | 165.86 mm |
| August | 22.9 °C | 33 °C | 205.99 mm |
| September | 22.6 °C | 32.1 °C | 164.85 mm |
| October | 20.1 °C | 29.8 °C | 88.14 mm |
| November | 16 °C | 26.8 °C | 48.51 mm |
| December | 13.3 °C | 24.7 °C | 40.39 mm |
| Annual | 17.8 °C | 28.9 °C | 1230.63 mm |
| Average First Frost Date | No Frost |
| Average Last Frost Date | |
| Average Days With Frost | Frost Free |
| Plant Hardiness Zone | Zone 10a : -1.1°C to 1.7°C |
| Plant Hardiness Zone - 2012 | Zone 10a : -1.1°C to 1.7°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |