Jeff, Kentucky has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 44.1 °F (low) to 67.4 °F (high). Annual precipitation averages 49.5 Inches. Jeff is located in USDA Plant Hardiness Zone 7a. 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 | 24.4 °F | 44.5 °F | 3.78 in. |
| February | 26.5 °F | 48.7 °F | 3.66 in. |
| March | 32.8 °F | 58.0 °F | 4.46 in. |
| April | 41.9 °F | 69.6 °F | 4.45 in. |
| May | 52.1 °F | 76.8 °F | 4.85 in. |
| June | 60.4 °F | 83.0 °F | 4.81 in. |
| July | 65.2 °F | 85.9 °F | 5.32 in. |
| August | 63.9 °F | 85.4 °F | 4.24 in. |
| September | 57.0 °F | 80.0 °F | 3.17 in. |
| October | 44.3 °F | 70.3 °F | 3.04 in. |
| November | 33.2 °F | 58.1 °F | 3.13 in. |
| December | 28.0 °F | 48.1 °F | 4.55 in. |
| Annual | 44.1 °F | 67.4 °F | 49.46 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |