Leesburg, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.6 °C (low) to 22.7 °C (high). Annual precipitation averages 1433.8 Millimeters. Leesburg is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -0.7 °C | 10.9 °C | 138.94 mm |
| February | 0.9 °C | 13.5 °C | 134.11 mm |
| March | 4.4 °C | 18.2 °C | 148.34 mm |
| April | 8.5 °C | 23.1 °C | 139.19 mm |
| May | 13.7 °C | 27.2 °C | 110.24 mm |
| June | 18.4 °C | 30.8 °C | 113.03 mm |
| July | 20.2 °C | 32.6 °C | 111.76 mm |
| August | 19.7 °C | 32.3 °C | 100.33 mm |
| September | 16.3 °C | 29.4 °C | 94.74 mm |
| October | 9.8 °C | 23.9 °C | 86.11 mm |
| November | 3.2 °C | 17.3 °C | 109.98 mm |
| December | 0.6 °C | 12.6 °C | 147.07 mm |
| Annual | 9.6 °C | 22.7 °C | 1433.84 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |