Lexington, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.2 °C (low) to 21.5 °C (high). Annual precipitation averages 1525 Millimeters. Lexington is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -1.4 °C | 9.6 °C | 138.18 mm |
| February | 0.1 °C | 12.1 °C | 141.22 mm |
| March | 4 °C | 16.9 °C | 146.3 mm |
| April | 8.5 °C | 21.9 °C | 135.64 mm |
| May | 13.7 °C | 26 °C | 131.32 mm |
| June | 17.9 °C | 29.8 °C | 120.14 mm |
| July | 19.9 °C | 31.3 °C | 127.25 mm |
| August | 19.2 °C | 31.2 °C | 107.7 mm |
| September | 15.6 °C | 28.6 °C | 108.97 mm |
| October | 9.1 °C | 22.9 °C | 101.85 mm |
| November | 3.2 °C | 16.2 °C | 108.46 mm |
| December | 0.1 °C | 11.2 °C | 157.99 mm |
| Annual | 9.2 °C | 21.5 °C | 1525.02 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°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 |