Coldiron, Kentucky has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 44.4 °F (low) to 67.1 °F (high). Annual precipitation averages 52.2 Inches. Coldiron 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. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 25.1 °F | 45.2 °F | 4.32 in. |
| February | 27.5 °F | 49.3 °F | 4.52 in. |
| March | 33.5 °F | 58.5 °F | 4.94 in. |
| April | 42.3 °F | 68.8 °F | 4.94 in. |
| May | 52.4 °F | 76.0 °F | 4.63 in. |
| June | 60.6 °F | 82.2 °F | 4.57 in. |
| July | 64.7 °F | 84.8 °F | 5.07 in. |
| August | 63.5 °F | 84.3 °F | 4.08 in. |
| September | 56.9 °F | 79.7 °F | 3.53 in. |
| October | 44.1 °F | 69.3 °F | 2.99 in. |
| November | 33.7 °F | 58.4 °F | 3.58 in. |
| December | 28.9 °F | 48.9 °F | 5.01 in. |
| Annual | 44.4 °F | 67.1 °F | 52.18 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 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 | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |