Fort Green, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 16.7 °C (low) to 28.5 °C (high). Annual precipitation averages 1402.9 Millimeters. Fort Green is located in USDA Plant Hardiness Zone 9b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 9.4 °C | 22.4 °C | 67.56 mm |
| February | 10.9 °C | 24.1 °C | 56.13 mm |
| March | 12.8 °C | 26.2 °C | 73.15 mm |
| April | 15.5 °C | 28.7 °C | 71.12 mm |
| May | 18.6 °C | 31.2 °C | 97.79 mm |
| June | 21.7 °C | 32.4 °C | 234.44 mm |
| July | 22.6 °C | 32.9 °C | 213.11 mm |
| August | 22.8 °C | 33.1 °C | 213.11 mm |
| September | 22.2 °C | 32.1 °C | 194.82 mm |
| October | 18.9 °C | 29.5 °C | 75.95 mm |
| November | 14.1 °C | 26.1 °C | 46.74 mm |
| December | 11.4 °C | 23.7 °C | 58.93 mm |
| Annual | 16.7 °C | 28.5 °C | 1402.85 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 |