Palm Harbor, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 18.7 °C (low) to 27.3 °C (high). Annual precipitation averages 1413.3 Millimeters. Palm Harbor is located in USDA Plant Hardiness Zone 10a.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 11.1 °C | 20.8 °C | 78.23 mm |
| February | 12.6 °C | 22.1 °C | 65.53 mm |
| March | 15 °C | 24.2 °C | 76.45 mm |
| April | 18.2 °C | 27.1 °C | 73.15 mm |
| May | 21.4 °C | 29.6 °C | 69.85 mm |
| June | 24 °C | 31.4 °C | 189.99 mm |
| July | 24.7 °C | 31.9 °C | 232.66 mm |
| August | 24.7 °C | 32.1 °C | 244.86 mm |
| September | 23.7 °C | 31.7 °C | 190.25 mm |
| October | 20.6 °C | 29 °C | 67.31 mm |
| November | 15.7 °C | 24.9 °C | 51.31 mm |
| December | 12.7 °C | 22.2 °C | 73.66 mm |
| Annual | 18.7 °C | 27.3 °C | 1413.25 mm |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 10a : -1.1°C to 1.7°C |
| Plant Hardiness Zone - 2012 | Zone 9b : -3.9°C to -1.1°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |