Zephyrhills, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 16.2 °C (low) to 28.2 °C (high). Annual precipitation averages 1430.3 Millimeters. Zephyrhills is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 8.5 °C | 21.7 °C | 86.87 mm |
| February | 10.1 °C | 23.3 °C | 64.01 mm |
| March | 11.9 °C | 25.7 °C | 72.64 mm |
| April | 15.1 °C | 28.5 °C | 76.45 mm |
| May | 18.4 °C | 31.3 °C | 84.58 mm |
| June | 21.6 °C | 32.4 °C | 222.76 mm |
| July | 22.6 °C | 32.7 °C | 217.17 mm |
| August | 22.8 °C | 32.8 °C | 229.36 mm |
| September | 21.8 °C | 32.1 °C | 183.64 mm |
| October | 18.1 °C | 29.3 °C | 77.72 mm |
| November | 13.1 °C | 25.7 °C | 46.48 mm |
| December | 10.2 °C | 23 °C | 68.58 mm |
| Annual | 16.2 °C | 28.2 °C | 1430.26 mm |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 9b : -3.9°C to -1.1°C |
| Plant Hardiness Zone - 2012 | Zone 9b : -3.9°C to -1.1°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |