Safety Harbor, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 18.8 °C (low) to 27.4 °C (high). Annual precipitation averages 1422.4 Millimeters. Safety Harbor is located in USDA Plant Hardiness Zone 10a.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 11.1 °C | 20.9 °C | 76.45 mm |
| February | 12.8 °C | 22.4 °C | 66.8 mm |
| March | 15.1 °C | 24.5 °C | 78.99 mm |
| April | 18.3 °C | 27.2 °C | 72.9 mm |
| May | 21.4 °C | 29.9 °C | 75.69 mm |
| June | 24 °C | 31.6 °C | 198.37 mm |
| July | 24.7 °C | 31.9 °C | 236.47 mm |
| August | 24.7 °C | 32.1 °C | 240.54 mm |
| September | 23.8 °C | 31.5 °C | 183.9 mm |
| October | 20.6 °C | 28.9 °C | 68.07 mm |
| November | 15.9 °C | 25.2 °C | 52.32 mm |
| December | 12.8 °C | 22.4 °C | 71.88 mm |
| Annual | 18.8 °C | 27.4 °C | 1422.38 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 | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |