Lexington, Kentucky has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 7.5 °C (low) to 18.2 °C (high). Annual precipitation averages 1228.1 Millimeters. Lexington is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -4.3 °C | 4.9 °C | 87.88 mm |
| February | -2.7 °C | 7.3 °C | 92.96 mm |
| March | 1.3 °C | 12.3 °C | 112.52 mm |
| April | 6.9 °C | 18.3 °C | 114.05 mm |
| May | 12.7 °C | 23.3 °C | 133.1 mm |
| June | 17 °C | 28 °C | 127.25 mm |
| July | 19.2 °C | 29.8 °C | 120.9 mm |
| August | 18.2 °C | 29.1 °C | 88.39 mm |
| September | 14.3 °C | 26.1 °C | 88.65 mm |
| October | 7.9 °C | 19.9 °C | 78.74 mm |
| November | 1.8 °C | 12.8 °C | 80.77 mm |
| December | -1.8 °C | 7.1 °C | 102.87 mm |
| Annual | 7.5 °C | 18.2 °C | 1228.08 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |