Gantt, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 12 °C (low) to 25.7 °C (high). Annual precipitation averages 1550.9 Millimeters. Gantt is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 2.2 °C | 15.9 °C | 141.99 mm |
| February | 4 °C | 18.4 °C | 122.17 mm |
| March | 7.4 °C | 22.2 °C | 141.99 mm |
| April | 11 °C | 25.9 °C | 121.16 mm |
| May | 15.7 °C | 29.8 °C | 111.76 mm |
| June | 20.1 °C | 32.7 °C | 145.03 mm |
| July | 21.6 °C | 33.5 °C | 164.08 mm |
| August | 21.3 °C | 33.1 °C | 139.95 mm |
| September | 18.5 °C | 31.3 °C | 119.38 mm |
| October | 12.3 °C | 26.7 °C | 92.96 mm |
| November | 6.3 °C | 21.2 °C | 111.51 mm |
| December | 3.8 °C | 17.2 °C | 138.94 mm |
| Annual | 12 °C | 25.7 °C | 1550.92 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |