Clay City, Kentucky has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 43.4 °F (low) to 66.3 °F (high). Annual precipitation averages 49.4 Inches. Clay City is located in USDA Plant Hardiness Zone 6b. 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 | 23.4 °F | 43.3 °F | 3.37 in. |
| February | 26.2 °F | 47.5 °F | 3.69 in. |
| March | 31.8 °F | 56.6 °F | 4.32 in. |
| April | 41.7 °F | 67.9 °F | 4.37 in. |
| May | 52.0 °F | 75.0 °F | 5.3 in. |
| June | 60.3 °F | 82.5 °F | 4.82 in. |
| July | 64.3 °F | 85.5 °F | 5.28 in. |
| August | 62.6 °F | 84.8 °F | 3.88 in. |
| September | 55.3 °F | 79.6 °F | 3.72 in. |
| October | 43.0 °F | 68.7 °F | 3.27 in. |
| November | 32.3 °F | 57.2 °F | 3.24 in. |
| December | 27.4 °F | 47.1 °F | 4.14 in. |
| Annual | 43.4 °F | 66.3 °F | 49.4 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 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |