Leitchfield, Kentucky has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 7.3 °C (low) to 19.4 °C (high). Annual precipitation averages 1297.2 Millimeters. Leitchfield is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -4.1 °C | 6 °C | 91.44 mm |
| February | -2.7 °C | 8.6 °C | 99.57 mm |
| March | 1.2 °C | 13.7 °C | 124.46 mm |
| April | 6.6 °C | 19.8 °C | 125.73 mm |
| May | 12.4 °C | 24.7 °C | 137.92 mm |
| June | 16.9 °C | 28.9 °C | 117.6 mm |
| July | 19 °C | 30.7 °C | 117.6 mm |
| August | 17.7 °C | 30.1 °C | 87.88 mm |
| September | 13.7 °C | 27.1 °C | 89.41 mm |
| October | 7.5 °C | 21.2 °C | 100.58 mm |
| November | 1.4 °C | 13.9 °C | 92.96 mm |
| December | -1.8 °C | 8.2 °C | 112.01 mm |
| Annual | 7.3 °C | 19.4 °C | 1297.16 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 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 |