Gardner, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 16.5 °C (low) to 28.8 °C (high). Annual precipitation averages 1348.7 Millimeters. Gardner is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 9.3 °C | 23.1 °C | 59.69 mm |
| February | 10.7 °C | 24.6 °C | 53.34 mm |
| March | 12.4 °C | 26.5 °C | 66.8 mm |
| April | 15.2 °C | 28.9 °C | 67.56 mm |
| May | 18.3 °C | 31.3 °C | 98.55 mm |
| June | 21.5 °C | 32.5 °C | 231.14 mm |
| July | 22.3 °C | 32.9 °C | 202.95 mm |
| August | 22.7 °C | 33.1 °C | 209.8 mm |
| September | 22.2 °C | 32.2 °C | 185.93 mm |
| October | 18.7 °C | 29.7 °C | 77.47 mm |
| November | 13.9 °C | 26.6 °C | 44.7 mm |
| December | 11.3 °C | 24.2 °C | 50.8 mm |
| Annual | 16.5 °C | 28.8 °C | 1348.73 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 | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |